From 7bb7c436e5f3dadd33ea79b847f0974b2b9c303f Mon Sep 17 00:00:00 2001
From: Andy Little <kwikius@yahoo.com>
Date: Wed, 28 Feb 2024 10:32:42 +0000
Subject: [PATCH] Waf: Replace 'python' with 'python3' in shebangs. See
 https://discuss.ardupilot.org/t/waf-update-waf-submodule-to-ardupilot-waf-master-user-setup-errror/113544

---
 build_system_kit/extpy/extpy.py                    | 2 +-
 build_system_kit/extpy/runme.py                    | 2 +-
 build_system_kit/extpy/wscript.py                  | 2 +-
 build_system_kit/makefile_dumper/wscript           | 2 +-
 build_system_kit/noscript/dbdlib.py                | 2 +-
 build_system_kit/nostate/ebdlib.py                 | 2 +-
 build_system_kit/nostate/wscript                   | 2 +-
 build_system_kit/overview/bbdlib.py                | 2 +-
 build_system_kit/parser/cbdlib.py                  | 2 +-
 demos/asm/wscript                                  | 2 +-
 demos/bisonflex/wscript                            | 2 +-
 demos/c++/wscript                                  | 2 +-
 demos/c/wscript                                    | 2 +-
 demos/csharp/wscript                               | 2 +-
 demos/d/wscript                                    | 2 +-
 demos/dbus/wscript                                 | 2 +-
 demos/fortran/mod/fakecc.py                        | 2 +-
 demos/fortran/mod/wscript                          | 2 +-
 demos/fortran/typemap/wscript                      | 2 +-
 demos/fortran/wscript                              | 2 +-
 demos/glib2/wscript                                | 2 +-
 demos/intltool/data/wscript                        | 2 +-
 demos/intltool/wscript                             | 2 +-
 demos/java/animals/wscript                         | 2 +-
 demos/java/cats/wscript                            | 2 +-
 demos/java/junit.py                                | 2 +-
 demos/java/wscript                                 | 2 +-
 demos/jni/wscript                                  | 2 +-
 demos/lua/wscript                                  | 2 +-
 demos/mac_app/wscript                              | 2 +-
 demos/perl/wscript                                 | 2 +-
 demos/precious/wscript                             | 2 +-
 demos/python/wscript                               | 2 +-
 demos/qt5/wscript                                  | 2 +-
 demos/ruby/wscript                                 | 2 +-
 demos/subst/wscript                                | 2 +-
 demos/tex/src/wscript                              | 2 +-
 demos/tex/wscript                                  | 2 +-
 demos/unit_test/tests/test2/test.py                | 2 +-
 demos/unit_test/tests/test3/test_import.py         | 2 +-
 demos/unit_test/tests/wscript                      | 2 +-
 demos/unit_test/wscript                            | 2 +-
 demos/vala/resources/wscript                       | 2 +-
 demos/vala/wscript                                 | 2 +-
 demos/variants/wscript                             | 2 +-
 demos/wscript                                      | 2 +-
 docs/slides/presentation/gfx/wscript               | 2 +-
 docs/slides/presentation/snippets/waf-2/wscript    | 2 +-
 docs/slides/presentation/wscript                   | 2 +-
 docs/sphinx/wscript                                | 2 +-
 playground/R/wscript                               | 2 +-
 playground/abstract_process/wscript                | 2 +-
 playground/boo/wscript                             | 2 +-
 playground/c-objects-stlib-shlib/wscript           | 2 +-
 playground/c/deps/wscript                          | 2 +-
 playground/c/stlib2/wscript                        | 2 +-
 playground/c/wscript                               | 2 +-
 playground/cfg_cache/wscript                       | 2 +-
 playground/codegen/wscript                         | 2 +-
 playground/compress/optim.py                       | 2 +-
 playground/compress/wscript                        | 2 +-
 playground/cpp_gen/wscript                         | 2 +-
 playground/cuda/cuda.py                            | 2 +-
 playground/cuda/wscript                            | 2 +-
 playground/cython/cython_cache.py                  | 2 +-
 playground/cython/wscript                          | 2 +-
 playground/daemon/daemon.py                        | 2 +-
 playground/daemon/wscript                          | 2 +-
 playground/descriptions/wscript                    | 2 +-
 playground/display/wscript                         | 2 +-
 playground/distnet/app/wscript                     | 2 +-
 playground/distnet/app2/wscript                    | 2 +-
 playground/distnet/server/cgi-bin/download.py      | 2 +-
 playground/distnet/server/cgi-bin/resolve.py       | 2 +-
 playground/distnet/server/cgi-bin/upload.py        | 2 +-
 playground/doxy/wscript                            | 2 +-
 playground/dynamic_build/wscript                   | 2 +-
 playground/dynamic_build2/wscript                  | 2 +-
 playground/dynamic_build3/wscript                  | 2 +-
 playground/dynamic_headers/wscript                 | 2 +-
 playground/dynamic_recursive_tasks/wscript         | 2 +-
 playground/eclipse/c/wscript                       | 2 +-
 playground/eclipse/java/animals/wscript            | 2 +-
 playground/eclipse/java/cats/wscript               | 2 +-
 playground/eclipse/java/junit.py                   | 2 +-
 playground/eclipse/java/wscript                    | 2 +-
 playground/eclipse/python/prg/src/prg1.py          | 2 +-
 playground/eclipse/python/wscript                  | 2 +-
 playground/eclipse/wscript                         | 2 +-
 playground/embedded_resources/wscript              | 2 +-
 playground/erlang/wscript                          | 2 +-
 playground/errcheck/typos/wscript                  | 2 +-
 playground/errcheck/wrong_top/wscript              | 2 +-
 playground/exclusive_link/excl.py                  | 2 +-
 playground/exclusive_link/wscript                  | 2 +-
 playground/extern_makefile/just_make/wscript       | 2 +-
 playground/extern_makefile/wscript                 | 2 +-
 playground/file_climbing/wscript                   | 2 +-
 playground/fluid/wscript                           | 2 +-
 playground/folder_hashing/fhash.py                 | 2 +-
 playground/folder_hashing/wscript                  | 2 +-
 playground/fsharp/wscript                          | 2 +-
 playground/fully_sequential_build/wscript          | 2 +-
 playground/gcj/gcj.py                              | 2 +-
 playground/gcj/wscript                             | 2 +-
 playground/gdbus/wscript                           | 2 +-
 playground/gtest/tests/wscript                     | 2 +-
 playground/gtest/wscript                           | 2 +-
 playground/hide_output/wscript                     | 2 +-
 playground/implicit_order/wscript                  | 2 +-
 playground/javatest/wscript                        | 2 +-
 playground/json/wscript                            | 2 +-
 playground/ldscript/wscript                        | 2 +-
 playground/libtest/wscript                         | 2 +-
 playground/lint/wscript                            | 2 +-
 playground/local_rpath/wscript                     | 2 +-
 playground/makedeps/wscript                        | 2 +-
 playground/maxjobs/wscript                         | 2 +-
 playground/maxjobs2/compute/look_busy.py           | 2 +-
 playground/maxjobs2/compute/wscript                | 2 +-
 playground/maxjobs2/wscript                        | 2 +-
 playground/msvs/wscript                            | 2 +-
 playground/nasm/wscript                            | 2 +-
 playground/netcache/wscript                        | 2 +-
 playground/objcopy/wscript                         | 2 +-
 playground/ocaml/wscript                           | 2 +-
 playground/package/wscript                         | 2 +-
 playground/parallel_cmd/wscript                    | 2 +-
 playground/pch/wscript                             | 2 +-
 playground/pep8/wscript                            | 2 +-
 playground/protoc/wscript                          | 2 +-
 playground/pyqt5/wscript                           | 2 +-
 playground/pytest/src/bar/bar.py                   | 2 +-
 playground/pytest/src/foo/foo.py                   | 2 +-
 playground/pytest/test/test_bar.py                 | 2 +-
 playground/pytest/test/test_baz.py                 | 2 +-
 playground/pytest/test/test_foo.py                 | 2 +-
 playground/pytest/wscript                          | 2 +-
 playground/qt4/wscript                             | 2 +-
 playground/qt5-and-pyqt5/pyqt5/wscript             | 2 +-
 playground/qt5-and-pyqt5/qt5/wscript               | 2 +-
 playground/qt5-and-pyqt5/qtchainer/qtchainer.py    | 2 +-
 playground/qt5-and-pyqt5/wscript                   | 2 +-
 playground/redirect/wscript                        | 2 +-
 playground/relocate/c/wscript                      | 2 +-
 playground/remote/wscript                          | 2 +-
 playground/rst/wscript                             | 2 +-
 playground/sas/wscript                             | 2 +-
 playground/scala/wscript                           | 2 +-
 playground/shrinking_sets/wscript                  | 2 +-
 playground/slow_qt/wscript                         | 2 +-
 playground/stale_files/wscript                     | 2 +-
 playground/stpl_c_py_cs_satellite_wix/src/build.py | 2 +-
 playground/stracedeps/wscript                      | 2 +-
 playground/strip/strip.py                          | 2 +-
 playground/strip/strip_hack.py                     | 2 +-
 playground/strip/strip_on_install.py               | 2 +-
 playground/strip/wscript                           | 2 +-
 playground/swig/wscript                            | 2 +-
 playground/syms/wscript                            | 2 +-
 playground/test_fail/wscript                       | 2 +-
 playground/test_times/wscript                      | 2 +-
 playground/ticgt/wscript                           | 2 +-
 playground/top_eq_out/wscript                      | 2 +-
 playground/track_output_files/wscript              | 2 +-
 playground/unity/wscript                           | 2 +-
 playground/updates/wscript                         | 2 +-
 playground/use/objects/lib/wscript                 | 2 +-
 playground/use/objects/libex/wscript               | 2 +-
 playground/use/wscript                             | 2 +-
 playground/xcode6/wscript                          | 2 +-
 playground/xilinx-ise/wscript                      | 2 +-
 tests/config/wscript                               | 2 +-
 tests/defines/wscript                              | 2 +-
 tests/different_top/wscript                        | 2 +-
 tests/general/wscript                              | 2 +-
 tests/headers/wscript                              | 2 +-
 tests/init/wscript                                 | 2 +-
 tests/install/wscript                              | 2 +-
 tests/install_group/wscript                        | 2 +-
 tests/post/wscript                                 | 2 +-
 tests/preproc/wscript                              | 2 +-
 tests/utils/wscript                                | 2 +-
 utils/genbench.py                                  | 2 +-
 utils/sign_file.py                                 | 2 +-
 utils/verify-sig.py                                | 2 +-
 waflib/Build.py                                    | 2 +-
 waflib/ConfigSet.py                                | 2 +-
 waflib/Configure.py                                | 2 +-
 waflib/Context.py                                  | 2 +-
 waflib/Errors.py                                   | 2 +-
 waflib/Logs.py                                     | 2 +-
 waflib/Node.py                                     | 2 +-
 waflib/Options.py                                  | 2 +-
 waflib/Runner.py                                   | 2 +-
 waflib/Scripting.py                                | 2 +-
 waflib/Task.py                                     | 2 +-
 waflib/TaskGen.py                                  | 2 +-
 waflib/Tools/__init__.py                           | 2 +-
 waflib/Tools/ar.py                                 | 2 +-
 waflib/Tools/asm.py                                | 2 +-
 waflib/Tools/bison.py                              | 2 +-
 waflib/Tools/c.py                                  | 2 +-
 waflib/Tools/c_aliases.py                          | 2 +-
 waflib/Tools/c_config.py                           | 2 +-
 waflib/Tools/c_osx.py                              | 2 +-
 waflib/Tools/c_preproc.py                          | 2 +-
 waflib/Tools/c_tests.py                            | 2 +-
 waflib/Tools/ccroot.py                             | 2 +-
 waflib/Tools/clang.py                              | 2 +-
 waflib/Tools/clangxx.py                            | 2 +-
 waflib/Tools/compiler_c.py                         | 2 +-
 waflib/Tools/compiler_cxx.py                       | 2 +-
 waflib/Tools/compiler_d.py                         | 2 +-
 waflib/Tools/compiler_fc.py                        | 2 +-
 waflib/Tools/cs.py                                 | 2 +-
 waflib/Tools/cxx.py                                | 2 +-
 waflib/Tools/d.py                                  | 2 +-
 waflib/Tools/d_config.py                           | 2 +-
 waflib/Tools/d_scan.py                             | 2 +-
 waflib/Tools/dbus.py                               | 2 +-
 waflib/Tools/dmd.py                                | 2 +-
 waflib/Tools/errcheck.py                           | 2 +-
 waflib/Tools/fc.py                                 | 2 +-
 waflib/Tools/fc_config.py                          | 2 +-
 waflib/Tools/fc_scan.py                            | 2 +-
 waflib/Tools/flex.py                               | 2 +-
 waflib/Tools/g95.py                                | 2 +-
 waflib/Tools/gas.py                                | 2 +-
 waflib/Tools/gcc.py                                | 2 +-
 waflib/Tools/gdc.py                                | 2 +-
 waflib/Tools/gfortran.py                           | 2 +-
 waflib/Tools/glib2.py                              | 2 +-
 waflib/Tools/gnu_dirs.py                           | 2 +-
 waflib/Tools/gxx.py                                | 2 +-
 waflib/Tools/icc.py                                | 2 +-
 waflib/Tools/icpc.py                               | 2 +-
 waflib/Tools/ifort.py                              | 2 +-
 waflib/Tools/intltool.py                           | 2 +-
 waflib/Tools/irixcc.py                             | 2 +-
 waflib/Tools/javaw.py                              | 2 +-
 waflib/Tools/ldc2.py                               | 2 +-
 waflib/Tools/lua.py                                | 2 +-
 waflib/Tools/md5_tstamp.py                         | 2 +-
 waflib/Tools/msvc.py                               | 2 +-
 waflib/Tools/nasm.py                               | 2 +-
 waflib/Tools/nobuild.py                            | 2 +-
 waflib/Tools/perl.py                               | 2 +-
 waflib/Tools/python.py                             | 2 +-
 waflib/Tools/qt5.py                                | 2 +-
 waflib/Tools/ruby.py                               | 2 +-
 waflib/Tools/suncc.py                              | 2 +-
 waflib/Tools/suncxx.py                             | 2 +-
 waflib/Tools/tex.py                                | 2 +-
 waflib/Tools/vala.py                               | 2 +-
 waflib/Tools/waf_unit_test.py                      | 2 +-
 waflib/Tools/winres.py                             | 2 +-
 waflib/Tools/xlc.py                                | 2 +-
 waflib/Tools/xlcxx.py                              | 2 +-
 waflib/Utils.py                                    | 2 +-
 waflib/__init__.py                                 | 2 +-
 waflib/ansiterm.py                                 | 2 +-
 waflib/extras/__init__.py                          | 2 +-
 waflib/extras/batched_cc.py                        | 2 +-
 waflib/extras/biber.py                             | 2 +-
 waflib/extras/bjam.py                              | 2 +-
 waflib/extras/blender.py                           | 2 +-
 waflib/extras/boo.py                               | 2 +-
 waflib/extras/boost.py                             | 2 +-
 waflib/extras/build_file_tracker.py                | 2 +-
 waflib/extras/build_logs.py                        | 2 +-
 waflib/extras/buildcopy.py                         | 2 +-
 waflib/extras/c_bgxlc.py                           | 2 +-
 waflib/extras/c_dumbpreproc.py                     | 2 +-
 waflib/extras/c_emscripten.py                      | 2 +-
 waflib/extras/c_nec.py                             | 2 +-
 waflib/extras/cabal.py                             | 2 +-
 waflib/extras/clang_compilation_database.py        | 2 +-
 waflib/extras/codelite.py                          | 2 +-
 waflib/extras/color_gcc.py                         | 2 +-
 waflib/extras/color_rvct.py                        | 2 +-
 waflib/extras/compat15.py                          | 2 +-
 waflib/extras/cppcheck.py                          | 2 +-
 waflib/extras/cpplint.py                           | 2 +-
 waflib/extras/cython.py                            | 2 +-
 waflib/extras/dcc.py                               | 2 +-
 waflib/extras/distnet.py                           | 2 +-
 waflib/extras/doxygen.py                           | 2 +-
 waflib/extras/dpapi.py                             | 2 +-
 waflib/extras/eclipse.py                           | 2 +-
 waflib/extras/erlang.py                            | 2 +-
 waflib/extras/fast_partial.py                      | 2 +-
 waflib/extras/fc_bgxlf.py                          | 2 +-
 waflib/extras/fc_cray.py                           | 2 +-
 waflib/extras/fc_nag.py                            | 2 +-
 waflib/extras/fc_nec.py                            | 2 +-
 waflib/extras/fc_open64.py                         | 2 +-
 waflib/extras/fc_pgfortran.py                      | 2 +-
 waflib/extras/fc_solstudio.py                      | 2 +-
 waflib/extras/fc_xlf.py                            | 2 +-
 waflib/extras/freeimage.py                         | 2 +-
 waflib/extras/fsb.py                               | 2 +-
 waflib/extras/fsc.py                               | 2 +-
 waflib/extras/gccdeps.py                           | 2 +-
 waflib/extras/gdbus.py                             | 2 +-
 waflib/extras/gob2.py                              | 2 +-
 waflib/extras/javatest.py                          | 2 +-
 waflib/extras/kde4.py                              | 2 +-
 waflib/extras/local_rpath.py                       | 2 +-
 waflib/extras/make.py                              | 2 +-
 waflib/extras/midl.py                              | 2 +-
 waflib/extras/msvcdeps.py                          | 2 +-
 waflib/extras/msvs.py                              | 2 +-
 waflib/extras/netcache_client.py                   | 2 +-
 waflib/extras/ocaml.py                             | 2 +-
 waflib/extras/package.py                           | 2 +-
 waflib/extras/parallel_debug.py                    | 2 +-
 waflib/extras/pch.py                               | 2 +-
 waflib/extras/pep8.py                              | 2 +-
 waflib/extras/pgicc.py                             | 2 +-
 waflib/extras/pgicxx.py                            | 2 +-
 waflib/extras/proc.py                              | 2 +-
 waflib/extras/protoc.py                            | 2 +-
 waflib/extras/pyqt5.py                             | 2 +-
 waflib/extras/pytest.py                            | 2 +-
 waflib/extras/qnxnto.py                            | 2 +-
 waflib/extras/qt4.py                               | 2 +-
 waflib/extras/relocation.py                        | 2 +-
 waflib/extras/remote.py                            | 2 +-
 waflib/extras/resx.py                              | 2 +-
 waflib/extras/review.py                            | 2 +-
 waflib/extras/rst.py                               | 2 +-
 waflib/extras/run_do_script.py                     | 2 +-
 waflib/extras/run_m_script.py                      | 2 +-
 waflib/extras/run_py_script.py                     | 2 +-
 waflib/extras/run_r_script.py                      | 2 +-
 waflib/extras/sas.py                               | 2 +-
 waflib/extras/scala.py                             | 2 +-
 waflib/extras/slow_qt4.py                          | 2 +-
 waflib/extras/softlink_libs.py                     | 2 +-
 waflib/extras/stale.py                             | 2 +-
 waflib/extras/stracedeps.py                        | 2 +-
 waflib/extras/swig.py                              | 2 +-
 waflib/extras/syms.py                              | 2 +-
 waflib/extras/ticgt.py                             | 2 +-
 waflib/extras/unity.py                             | 2 +-
 waflib/extras/use_config.py                        | 2 +-
 waflib/extras/valadoc.py                           | 2 +-
 waflib/extras/waf_xattr.py                         | 2 +-
 waflib/extras/why.py                               | 2 +-
 waflib/extras/win32_opts.py                        | 2 +-
 waflib/extras/xcode6.py                            | 2 +-
 waflib/fixpy2.py                                   | 2 +-
 waflib/processor.py                                | 2 +-
 wscript                                            | 2 +-
 355 files changed, 355 insertions(+), 355 deletions(-)

diff --git a/build_system_kit/extpy/extpy.py b/build_system_kit/extpy/extpy.py
index e6446850dc..21f852f39d 100644
--- a/build_system_kit/extpy/extpy.py
+++ b/build_system_kit/extpy/extpy.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import os
diff --git a/build_system_kit/extpy/runme.py b/build_system_kit/extpy/runme.py
index 13d511681f..b5577e814c 100755
--- a/build_system_kit/extpy/runme.py
+++ b/build_system_kit/extpy/runme.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/build_system_kit/extpy/wscript.py b/build_system_kit/extpy/wscript.py
index c0e6ddfd45..e1954f9efc 100644
--- a/build_system_kit/extpy/wscript.py
+++ b/build_system_kit/extpy/wscript.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def configure(conf):
diff --git a/build_system_kit/makefile_dumper/wscript b/build_system_kit/makefile_dumper/wscript
index d3a3d6bc1e..7caf5df080 100644
--- a/build_system_kit/makefile_dumper/wscript
+++ b/build_system_kit/makefile_dumper/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/build_system_kit/noscript/dbdlib.py b/build_system_kit/noscript/dbdlib.py
index 6a39287895..d2b49e34f0 100644
--- a/build_system_kit/noscript/dbdlib.py
+++ b/build_system_kit/noscript/dbdlib.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, imp
 from waflib import Context, Options, Configure, Utils, Logs, TaskGen, Task
diff --git a/build_system_kit/nostate/ebdlib.py b/build_system_kit/nostate/ebdlib.py
index f8af4a3783..f569ca656a 100644
--- a/build_system_kit/nostate/ebdlib.py
+++ b/build_system_kit/nostate/ebdlib.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, imp, time
 from waflib import Context, Options, Configure, Utils, Logs, TaskGen, Task, Build, ConfigSet
diff --git a/build_system_kit/nostate/wscript b/build_system_kit/nostate/wscript
index b3e42213ca..c3a76b58f8 100644
--- a/build_system_kit/nostate/wscript
+++ b/build_system_kit/nostate/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/build_system_kit/overview/bbdlib.py b/build_system_kit/overview/bbdlib.py
index 2cf2c46a99..1058552f61 100644
--- a/build_system_kit/overview/bbdlib.py
+++ b/build_system_kit/overview/bbdlib.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, imp
 from waflib import Context, Options, Configure, Utils, Logs
diff --git a/build_system_kit/parser/cbdlib.py b/build_system_kit/parser/cbdlib.py
index 8d6946e74e..cccffb502b 100644
--- a/build_system_kit/parser/cbdlib.py
+++ b/build_system_kit/parser/cbdlib.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, imp, re
 from waflib import Context, Options, Configure, Utils, Logs
diff --git a/demos/asm/wscript b/demos/asm/wscript
index 6d9e5ea504..924cbc642d 100644
--- a/demos/asm/wscript
+++ b/demos/asm/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import sys
diff --git a/demos/bisonflex/wscript b/demos/bisonflex/wscript
index dd42af264a..acf6ca8e30 100644
--- a/demos/bisonflex/wscript
+++ b/demos/bisonflex/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def options(opt):
diff --git a/demos/c++/wscript b/demos/c++/wscript
index ca9d9822fa..c58400d859 100644
--- a/demos/c++/wscript
+++ b/demos/c++/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/demos/c/wscript b/demos/c/wscript
index b9c8b8a8f5..19aba7094d 100644
--- a/demos/c/wscript
+++ b/demos/c/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2012 (ita)
 
diff --git a/demos/csharp/wscript b/demos/csharp/wscript
index 775b68da03..699843756b 100644
--- a/demos/csharp/wscript
+++ b/demos/csharp/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/demos/d/wscript b/demos/d/wscript
index d734e401e3..09d5be517c 100644
--- a/demos/d/wscript
+++ b/demos/d/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006 (ita)
 
diff --git a/demos/dbus/wscript b/demos/dbus/wscript
index 7d3683a751..a04a0420c4 100644
--- a/demos/dbus/wscript
+++ b/demos/dbus/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/demos/fortran/mod/fakecc.py b/demos/fortran/mod/fakecc.py
index fa9194464a..e616b20fc6 100644
--- a/demos/fortran/mod/fakecc.py
+++ b/demos/fortran/mod/fakecc.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2010 (ita)
diff --git a/demos/fortran/mod/wscript b/demos/fortran/mod/wscript
index 198f6d9f13..c10e39f3d1 100644
--- a/demos/fortran/mod/wscript
+++ b/demos/fortran/mod/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2010 (ita)
diff --git a/demos/fortran/typemap/wscript b/demos/fortran/typemap/wscript
index 9e66f00b17..ec4a8e0cc0 100644
--- a/demos/fortran/typemap/wscript
+++ b/demos/fortran/typemap/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 top = '.'
 out = 'build'
diff --git a/demos/fortran/wscript b/demos/fortran/wscript
index f1fb5d7c18..7c8d42ff3d 100644
--- a/demos/fortran/wscript
+++ b/demos/fortran/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2010 (ita)
diff --git a/demos/glib2/wscript b/demos/glib2/wscript
index 2bfa7d47ce..96f67fa950 100644
--- a/demos/glib2/wscript
+++ b/demos/glib2/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005, 2010 (ita)
 
diff --git a/demos/intltool/data/wscript b/demos/intltool/data/wscript
index 27ae2d1a8f..0e5630e6d9 100644
--- a/demos/intltool/data/wscript
+++ b/demos/intltool/data/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 from waflib import Utils
 
diff --git a/demos/intltool/wscript b/demos/intltool/wscript
index dfd6263bcb..fa865d9f0b 100644
--- a/demos/intltool/wscript
+++ b/demos/intltool/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/demos/java/animals/wscript b/demos/java/animals/wscript
index 159f38746c..738ef5236e 100644
--- a/demos/java/animals/wscript
+++ b/demos/java/animals/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def build(bld):
 
diff --git a/demos/java/cats/wscript b/demos/java/cats/wscript
index 5a9bdbfc0d..01a4b57da3 100644
--- a/demos/java/cats/wscript
+++ b/demos/java/cats/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def build(bld):
 
diff --git a/demos/java/junit.py b/demos/java/junit.py
index 4a271e5183..fc00e22e64 100644
--- a/demos/java/junit.py
+++ b/demos/java/junit.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/demos/java/wscript b/demos/java/wscript
index 9c927c7c13..5fb7bb81a7 100644
--- a/demos/java/wscript
+++ b/demos/java/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/demos/jni/wscript b/demos/jni/wscript
index 9dda37335b..9b2fcc8ced 100644
--- a/demos/jni/wscript
+++ b/demos/jni/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Zellman 2009
 
diff --git a/demos/lua/wscript b/demos/lua/wscript
index 895e9190f2..4ef48fa4ad 100644
--- a/demos/lua/wscript
+++ b/demos/lua/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 def configure(conf):
diff --git a/demos/mac_app/wscript b/demos/mac_app/wscript
index 0cb9c5fff6..7b503e92be 100644
--- a/demos/mac_app/wscript
+++ b/demos/mac_app/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Chris Pickel, 2011
 
diff --git a/demos/perl/wscript b/demos/perl/wscript
index a20c80f72c..73e1c2bcfe 100644
--- a/demos/perl/wscript
+++ b/demos/perl/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # anonymous coward, 2007
 # Thomas Nagy, 2010
diff --git a/demos/precious/wscript b/demos/precious/wscript
index 1d8ed5eca3..58cca9ce4d 100644
--- a/demos/precious/wscript
+++ b/demos/precious/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def options(opt):
diff --git a/demos/python/wscript b/demos/python/wscript
index 07b5b666f1..7c647a2cdb 100644
--- a/demos/python/wscript
+++ b/demos/python/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Gustavo Carneiro, 2007
 
diff --git a/demos/qt5/wscript b/demos/qt5/wscript
index 5ab374c916..4fdf4554ed 100644
--- a/demos/qt5/wscript
+++ b/demos/qt5/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016 (ita)
 
diff --git a/demos/ruby/wscript b/demos/ruby/wscript
index 0b1d2c42b6..1892bf6de7 100644
--- a/demos/ruby/wscript
+++ b/demos/ruby/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Frauendorfer, 2010
 
diff --git a/demos/subst/wscript b/demos/subst/wscript
index 0d6dab8235..19a2a1394e 100644
--- a/demos/subst/wscript
+++ b/demos/subst/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 top = '.'
diff --git a/demos/tex/src/wscript b/demos/tex/src/wscript
index 7e45efaebb..d74602a166 100644
--- a/demos/tex/src/wscript
+++ b/demos/tex/src/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/demos/tex/wscript b/demos/tex/wscript
index c2da48357f..a4f3bb5c92 100644
--- a/demos/tex/wscript
+++ b/demos/tex/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2015 (ita)
 
diff --git a/demos/unit_test/tests/test2/test.py b/demos/unit_test/tests/test2/test.py
index 20b4ff325f..f6bcae8912 100644
--- a/demos/unit_test/tests/test2/test.py
+++ b/demos/unit_test/tests/test2/test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 import sys
 print('success')
diff --git a/demos/unit_test/tests/test3/test_import.py b/demos/unit_test/tests/test3/test_import.py
index 8384e2bf60..1b7209f31c 100644
--- a/demos/unit_test/tests/test3/test_import.py
+++ b/demos/unit_test/tests/test3/test_import.py
@@ -1,3 +1,3 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 print('imported')
diff --git a/demos/unit_test/tests/wscript b/demos/unit_test/tests/wscript
index c5ef82c5f5..65dd2b3551 100644
--- a/demos/unit_test/tests/wscript
+++ b/demos/unit_test/tests/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def build(bld):
diff --git a/demos/unit_test/wscript b/demos/unit_test/wscript
index 3f45c66b79..595d2d8267 100644
--- a/demos/unit_test/wscript
+++ b/demos/unit_test/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Richard Quirk, 2008
 
diff --git a/demos/vala/resources/wscript b/demos/vala/resources/wscript
index ca6ec6821d..c67e0e47aa 100644
--- a/demos/vala/resources/wscript
+++ b/demos/vala/resources/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def configure(conf):
 	try:
diff --git a/demos/vala/wscript b/demos/vala/wscript
index 3eb6a9fcb8..683c2751c5 100644
--- a/demos/vala/wscript
+++ b/demos/vala/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jaap Haitsma, 2008
 
diff --git a/demos/variants/wscript b/demos/variants/wscript
index 167dcbe01e..facec0cd1b 100644
--- a/demos/variants/wscript
+++ b/demos/variants/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/demos/wscript b/demos/wscript
index 96036c0728..68a30082bb 100644
--- a/demos/wscript
+++ b/demos/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # J. Carretero, 2010 (zougloub)
 # Thomas Nagy, 2010 (ita)
diff --git a/docs/slides/presentation/gfx/wscript b/docs/slides/presentation/gfx/wscript
index 94c8549756..981fdd30a0 100644
--- a/docs/slides/presentation/gfx/wscript
+++ b/docs/slides/presentation/gfx/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/docs/slides/presentation/snippets/waf-2/wscript b/docs/slides/presentation/snippets/waf-2/wscript
index 09fc94ef91..6ead84d266 100644
--- a/docs/slides/presentation/snippets/waf-2/wscript
+++ b/docs/slides/presentation/snippets/waf-2/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def configure(ctx):
diff --git a/docs/slides/presentation/wscript b/docs/slides/presentation/wscript
index 1bd8862ba7..f7464d3b3d 100644
--- a/docs/slides/presentation/wscript
+++ b/docs/slides/presentation/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero, 2010 (zougloub)
 
diff --git a/docs/sphinx/wscript b/docs/sphinx/wscript
index d9fd4b4973..eeb384fcc8 100644
--- a/docs/sphinx/wscript
+++ b/docs/sphinx/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero, 2010 (zougloub)
 
diff --git a/playground/R/wscript b/playground/R/wscript
index 80d0ba6a11..3ae8a1e277 100644
--- a/playground/R/wscript
+++ b/playground/R/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 VERSION = '1.0.0'
diff --git a/playground/abstract_process/wscript b/playground/abstract_process/wscript
index cb8281e55b..9b1db1006b 100644
--- a/playground/abstract_process/wscript
+++ b/playground/abstract_process/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def configure(conf):
 	pass
diff --git a/playground/boo/wscript b/playground/boo/wscript
index bfc69165d1..335bb49d04 100644
--- a/playground/boo/wscript
+++ b/playground/boo/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 ##
 # This wscript shows the power of the CLI!
diff --git a/playground/c-objects-stlib-shlib/wscript b/playground/c-objects-stlib-shlib/wscript
index 901072e400..8fe15bbd2d 100644
--- a/playground/c-objects-stlib-shlib/wscript
+++ b/playground/c-objects-stlib-shlib/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero, 2013 (zougloub)
 
diff --git a/playground/c/deps/wscript b/playground/c/deps/wscript
index 7a19dcf125..3427962e73 100644
--- a/playground/c/deps/wscript
+++ b/playground/c/deps/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import shutil
 import time
 
diff --git a/playground/c/stlib2/wscript b/playground/c/stlib2/wscript
index 628dc68a2d..3b3cd3a51c 100644
--- a/playground/c/stlib2/wscript
+++ b/playground/c/stlib2/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """static libraries using other static libraries"""
 
diff --git a/playground/c/wscript b/playground/c/wscript
index 7fad6c5f10..b0e5a03b82 100644
--- a/playground/c/wscript
+++ b/playground/c/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/playground/cfg_cache/wscript b/playground/cfg_cache/wscript
index f30ef6a441..e6482717af 100644
--- a/playground/cfg_cache/wscript
+++ b/playground/cfg_cache/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 compare the execution time of
diff --git a/playground/codegen/wscript b/playground/codegen/wscript
index 2ca93c415e..cd4a111102 100644
--- a/playground/codegen/wscript
+++ b/playground/codegen/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 def options(opt):
diff --git a/playground/compress/optim.py b/playground/compress/optim.py
index e318cef0b7..639353f048 100755
--- a/playground/compress/optim.py
+++ b/playground/compress/optim.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, subprocess, shutil, random, optparse
 
diff --git a/playground/compress/wscript b/playground/compress/wscript
index 40f7a126a8..dc56ee3a1f 100644
--- a/playground/compress/wscript
+++ b/playground/compress/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 You will need either bzip2 or gzip, and a local waf copy
diff --git a/playground/cpp_gen/wscript b/playground/cpp_gen/wscript
index 14c557e796..ca72c017ba 100644
--- a/playground/cpp_gen/wscript
+++ b/playground/cpp_gen/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/cuda/cuda.py b/playground/cuda/cuda.py
index 3c3a84bcb9..43c04afac0 100644
--- a/playground/cuda/cuda.py
+++ b/playground/cuda/cuda.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010
 
diff --git a/playground/cuda/wscript b/playground/cuda/wscript
index 64053112e0..41d5e964e0 100644
--- a/playground/cuda/wscript
+++ b/playground/cuda/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010
 
diff --git a/playground/cython/cython_cache.py b/playground/cython/cython_cache.py
index d4d5221766..fefe50619d 100644
--- a/playground/cython/cython_cache.py
+++ b/playground/cython/cython_cache.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2012
 
diff --git a/playground/cython/wscript b/playground/cython/wscript
index 1cdd8a41cb..d8c3c30ee0 100644
--- a/playground/cython/wscript
+++ b/playground/cython/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010
 
diff --git a/playground/daemon/daemon.py b/playground/daemon/daemon.py
index 95e17e67ad..1ee8bdb809 100644
--- a/playground/daemon/daemon.py
+++ b/playground/daemon/daemon.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Matthias Jahn 2006
 # rewritten by Thomas Nagy 2009
diff --git a/playground/daemon/wscript b/playground/daemon/wscript
index 502a5738b0..df21263335 100644
--- a/playground/daemon/wscript
+++ b/playground/daemon/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2009 (ita)
 
diff --git a/playground/descriptions/wscript b/playground/descriptions/wscript
index 9e0b80dce6..7bee93b8be 100644
--- a/playground/descriptions/wscript
+++ b/playground/descriptions/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Justin Israel, 2017 
 
diff --git a/playground/display/wscript b/playground/display/wscript
index 57775d33af..d2b8267a8d 100644
--- a/playground/display/wscript
+++ b/playground/display/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016 (ita)
 
diff --git a/playground/distnet/app/wscript b/playground/distnet/app/wscript
index d31647fd16..8bf3b52194 100644
--- a/playground/distnet/app/wscript
+++ b/playground/distnet/app/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/playground/distnet/app2/wscript b/playground/distnet/app2/wscript
index 5a97a16a12..a0a018e0bb 100644
--- a/playground/distnet/app2/wscript
+++ b/playground/distnet/app2/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 VERSION='0.0.1'
diff --git a/playground/distnet/server/cgi-bin/download.py b/playground/distnet/server/cgi-bin/download.py
index 6f73bc9890..a5520380e2 100755
--- a/playground/distnet/server/cgi-bin/download.py
+++ b/playground/distnet/server/cgi-bin/download.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys
 import cgi, cgitb
diff --git a/playground/distnet/server/cgi-bin/resolve.py b/playground/distnet/server/cgi-bin/resolve.py
index 24b04a31d9..bc0acb7b3f 100755
--- a/playground/distnet/server/cgi-bin/resolve.py
+++ b/playground/distnet/server/cgi-bin/resolve.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys
 import cgi, cgitb
diff --git a/playground/distnet/server/cgi-bin/upload.py b/playground/distnet/server/cgi-bin/upload.py
index fbbeaacff7..92506aacb5 100755
--- a/playground/distnet/server/cgi-bin/upload.py
+++ b/playground/distnet/server/cgi-bin/upload.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, tempfile, shutil, hashlib, tarfile
 import cgi, cgitb
diff --git a/playground/doxy/wscript b/playground/doxy/wscript
index 7ed4ffcc30..d9b8e40269 100644
--- a/playground/doxy/wscript
+++ b/playground/doxy/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2008-2012 (ita)
 
diff --git a/playground/dynamic_build/wscript b/playground/dynamic_build/wscript
index 296a1af41f..81a2b937ee 100644
--- a/playground/dynamic_build/wscript
+++ b/playground/dynamic_build/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/dynamic_build2/wscript b/playground/dynamic_build2/wscript
index 84bceb6019..f3add9c11a 100644
--- a/playground/dynamic_build2/wscript
+++ b/playground/dynamic_build2/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/dynamic_build3/wscript b/playground/dynamic_build3/wscript
index 6864ea9a21..ec48b986e9 100644
--- a/playground/dynamic_build3/wscript
+++ b/playground/dynamic_build3/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2013 (ita)
 
diff --git a/playground/dynamic_headers/wscript b/playground/dynamic_headers/wscript
index 82b909a77a..eb0d111dc7 100644
--- a/playground/dynamic_headers/wscript
+++ b/playground/dynamic_headers/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 from waflib import Task, Errors
 from waflib.Tools import c
diff --git a/playground/dynamic_recursive_tasks/wscript b/playground/dynamic_recursive_tasks/wscript
index ed485c53b6..a89ebe2f3b 100644
--- a/playground/dynamic_recursive_tasks/wscript
+++ b/playground/dynamic_recursive_tasks/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/eclipse/c/wscript b/playground/eclipse/c/wscript
index dbdce20b51..f71d8f2702 100644
--- a/playground/eclipse/c/wscript
+++ b/playground/eclipse/c/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def options(opt):
diff --git a/playground/eclipse/java/animals/wscript b/playground/eclipse/java/animals/wscript
index 159f38746c..738ef5236e 100644
--- a/playground/eclipse/java/animals/wscript
+++ b/playground/eclipse/java/animals/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def build(bld):
 
diff --git a/playground/eclipse/java/cats/wscript b/playground/eclipse/java/cats/wscript
index 5a9bdbfc0d..01a4b57da3 100644
--- a/playground/eclipse/java/cats/wscript
+++ b/playground/eclipse/java/cats/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def build(bld):
 
diff --git a/playground/eclipse/java/junit.py b/playground/eclipse/java/junit.py
index 4a271e5183..fc00e22e64 100644
--- a/playground/eclipse/java/junit.py
+++ b/playground/eclipse/java/junit.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/playground/eclipse/java/wscript b/playground/eclipse/java/wscript
index d517174e11..9725518a13 100644
--- a/playground/eclipse/java/wscript
+++ b/playground/eclipse/java/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/playground/eclipse/python/prg/src/prg1.py b/playground/eclipse/python/prg/src/prg1.py
index 65798c5c2e..a7dde9c69b 100644
--- a/playground/eclipse/python/prg/src/prg1.py
+++ b/playground/eclipse/python/prg/src/prg1.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import mod1.Mod1ObjOri
diff --git a/playground/eclipse/python/wscript b/playground/eclipse/python/wscript
index 7576137f4b..55a37d03bc 100644
--- a/playground/eclipse/python/wscript
+++ b/playground/eclipse/python/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 
diff --git a/playground/eclipse/wscript b/playground/eclipse/wscript
index 7d53ab79e3..e1816d6bb5 100644
--- a/playground/eclipse/wscript
+++ b/playground/eclipse/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Federico Pellegrin 2017 (fedepell)
 
diff --git a/playground/embedded_resources/wscript b/playground/embedded_resources/wscript
index 3a872cbd13..5a3bcf6ef7 100644
--- a/playground/embedded_resources/wscript
+++ b/playground/embedded_resources/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #Demo on embedding resources in executables
 
 """
diff --git a/playground/erlang/wscript b/playground/erlang/wscript
index 2cf077d981..90bd5e7a13 100644
--- a/playground/erlang/wscript
+++ b/playground/erlang/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def configure(conf):
 	conf.load('erlang')
diff --git a/playground/errcheck/typos/wscript b/playground/errcheck/typos/wscript
index 6b37b93349..561b96bdec 100644
--- a/playground/errcheck/typos/wscript
+++ b/playground/errcheck/typos/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/errcheck/wrong_top/wscript b/playground/errcheck/wrong_top/wscript
index e6416f53e8..ee0f20caa5 100644
--- a/playground/errcheck/wrong_top/wscript
+++ b/playground/errcheck/wrong_top/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/exclusive_link/excl.py b/playground/exclusive_link/excl.py
index 351ddb298d..681cfba802 100644
--- a/playground/exclusive_link/excl.py
+++ b/playground/exclusive_link/excl.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011-2015 (ita)
 
diff --git a/playground/exclusive_link/wscript b/playground/exclusive_link/wscript
index 919edf947c..8547d04133 100644
--- a/playground/exclusive_link/wscript
+++ b/playground/exclusive_link/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/playground/extern_makefile/just_make/wscript b/playground/extern_makefile/just_make/wscript
index 7d2b2253c3..c27d08c3e9 100644
--- a/playground/extern_makefile/just_make/wscript
+++ b/playground/extern_makefile/just_make/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 from waflib import Build
 def build(bld):
diff --git a/playground/extern_makefile/wscript b/playground/extern_makefile/wscript
index 82c9605e3c..7226e01451 100644
--- a/playground/extern_makefile/wscript
+++ b/playground/extern_makefile/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def configure(conf):
 	conf.env.thecmd = 'all'
diff --git a/playground/file_climbing/wscript b/playground/file_climbing/wscript
index 6036a7e304..ecc8a55dba 100644
--- a/playground/file_climbing/wscript
+++ b/playground/file_climbing/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2014-2015 (ita)
 
diff --git a/playground/fluid/wscript b/playground/fluid/wscript
index c6cecc2886..f6e9a6fc08 100644
--- a/playground/fluid/wscript
+++ b/playground/fluid/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Grygoriy Fuchedzhy 2009
 
diff --git a/playground/folder_hashing/fhash.py b/playground/folder_hashing/fhash.py
index 94e01d341f..1a0c04ea68 100644
--- a/playground/folder_hashing/fhash.py
+++ b/playground/folder_hashing/fhash.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/playground/folder_hashing/wscript b/playground/folder_hashing/wscript
index cf1d73f4fd..5d457aeebc 100644
--- a/playground/folder_hashing/wscript
+++ b/playground/folder_hashing/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def configure(conf):
diff --git a/playground/fsharp/wscript b/playground/fsharp/wscript
index 0187e47eec..b281f38f80 100644
--- a/playground/fsharp/wscript
+++ b/playground/fsharp/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/playground/fully_sequential_build/wscript b/playground/fully_sequential_build/wscript
index 9ebdfe28d0..1d9a23eff6 100644
--- a/playground/fully_sequential_build/wscript
+++ b/playground/fully_sequential_build/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/playground/gcj/gcj.py b/playground/gcj/gcj.py
index ddbb698e91..4521e8d5c8 100644
--- a/playground/gcj/gcj.py
+++ b/playground/gcj/gcj.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2008 (ita)
 
diff --git a/playground/gcj/wscript b/playground/gcj/wscript
index 00855929b1..e787c2d3a2 100644
--- a/playground/gcj/wscript
+++ b/playground/gcj/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2008 (ita)
 
diff --git a/playground/gdbus/wscript b/playground/gdbus/wscript
index b5a8de3c4d..5d30ef5573 100644
--- a/playground/gdbus/wscript
+++ b/playground/gdbus/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Copyright Garmin International or its subsidiaries, 2018
 
diff --git a/playground/gtest/tests/wscript b/playground/gtest/tests/wscript
index 80f617e093..cffc3db09b 100644
--- a/playground/gtest/tests/wscript
+++ b/playground/gtest/tests/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 def build(bld):
diff --git a/playground/gtest/wscript b/playground/gtest/wscript
index 759bc32fc1..b8c4305be4 100644
--- a/playground/gtest/wscript
+++ b/playground/gtest/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Sylvain Rouquette, 2014
 # based on Richard Quirk's demo (unit_test), 2008
diff --git a/playground/hide_output/wscript b/playground/hide_output/wscript
index 48c99ba53d..42b3622bea 100644
--- a/playground/hide_output/wscript
+++ b/playground/hide_output/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 the feature 'hidden' is used to display the task output for make-like rules
diff --git a/playground/implicit_order/wscript b/playground/implicit_order/wscript
index 2d4905c164..5e7594cae4 100644
--- a/playground/implicit_order/wscript
+++ b/playground/implicit_order/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/playground/javatest/wscript b/playground/javatest/wscript
index c250a21a13..42b5d9f87f 100644
--- a/playground/javatest/wscript
+++ b/playground/javatest/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Federico Pellegrin, 2017 (fedepell)
 
diff --git a/playground/json/wscript b/playground/json/wscript
index 48f819b478..2984363ba0 100644
--- a/playground/json/wscript
+++ b/playground/json/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Matt Clarkson, 2015 (ita)
 
diff --git a/playground/ldscript/wscript b/playground/ldscript/wscript
index 1116134e78..626a007a7a 100644
--- a/playground/ldscript/wscript
+++ b/playground/ldscript/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2009 (ita)
 
diff --git a/playground/libtest/wscript b/playground/libtest/wscript
index 13e0032c6f..da308c6f1c 100644
--- a/playground/libtest/wscript
+++ b/playground/libtest/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(opt):
 	opt.load('compiler_c')
diff --git a/playground/lint/wscript b/playground/lint/wscript
index 83ee4c074f..01e33da65b 100644
--- a/playground/lint/wscript
+++ b/playground/lint/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2012 (ita)
 
diff --git a/playground/local_rpath/wscript b/playground/local_rpath/wscript
index e62afffe9f..a2146c67c4 100644
--- a/playground/local_rpath/wscript
+++ b/playground/local_rpath/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/playground/makedeps/wscript b/playground/makedeps/wscript
index 78b9d0f88e..146e993102 100644
--- a/playground/makedeps/wscript
+++ b/playground/makedeps/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 A build iterator similar to "waf step" but following the dependencies of input/output files
diff --git a/playground/maxjobs/wscript b/playground/maxjobs/wscript
index fe202fb534..a03fdc60eb 100644
--- a/playground/maxjobs/wscript
+++ b/playground/maxjobs/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 # the Task class attribute "maxjobs" was deprecated in Waf 1.6
 # limiting the amount of jobs is commonly done by adding sequential
diff --git a/playground/maxjobs2/compute/look_busy.py b/playground/maxjobs2/compute/look_busy.py
index 9183ff3aea..f2897abd8e 100755
--- a/playground/maxjobs2/compute/look_busy.py
+++ b/playground/maxjobs2/compute/look_busy.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 import sys, time
 loops = int(sys.argv[1])
diff --git a/playground/maxjobs2/compute/wscript b/playground/maxjobs2/compute/wscript
index 381ef8fd27..65bd4027e2 100644
--- a/playground/maxjobs2/compute/wscript
+++ b/playground/maxjobs2/compute/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 # The following example shows how several build processes can collaborate
 # to stop spawning new processes when a special task of type K is executed
diff --git a/playground/maxjobs2/wscript b/playground/maxjobs2/wscript
index 84294a93b3..189128f05c 100644
--- a/playground/maxjobs2/wscript
+++ b/playground/maxjobs2/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 # execute several instances of the build in "compute" (look in the wscript over there)
 
diff --git a/playground/msvs/wscript b/playground/msvs/wscript
index b23c6c25fc..649e429668 100644
--- a/playground/msvs/wscript
+++ b/playground/msvs/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016 (ita)
 
diff --git a/playground/nasm/wscript b/playground/nasm/wscript
index 47619521bb..52e7c87422 100644
--- a/playground/nasm/wscript
+++ b/playground/nasm/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import sys
diff --git a/playground/netcache/wscript b/playground/netcache/wscript
index e0b215a3a7..631007b3b6 100644
--- a/playground/netcache/wscript
+++ b/playground/netcache/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2016 (ita)
 #
diff --git a/playground/objcopy/wscript b/playground/objcopy/wscript
index b897a9f921..5de4eb1b7b 100644
--- a/playground/objcopy/wscript
+++ b/playground/objcopy/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(ctx):
     ctx.load('compiler_c')
diff --git a/playground/ocaml/wscript b/playground/ocaml/wscript
index 77ae7e5cc6..151eb4aff3 100644
--- a/playground/ocaml/wscript
+++ b/playground/ocaml/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2010 (ita)
 
diff --git a/playground/package/wscript b/playground/package/wscript
index 5004b6a861..b935c84aed 100644
--- a/playground/package/wscript
+++ b/playground/package/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Create a tarball of the build results. The package command aggregates
diff --git a/playground/parallel_cmd/wscript b/playground/parallel_cmd/wscript
index b540eb9225..2b68464018 100644
--- a/playground/parallel_cmd/wscript
+++ b/playground/parallel_cmd/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 VERSION='0.0.1'
diff --git a/playground/pch/wscript b/playground/pch/wscript
index 0331618d53..2646de2cdb 100644
--- a/playground/pch/wscript
+++ b/playground/pch/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006 (ita)
 
diff --git a/playground/pep8/wscript b/playground/pep8/wscript
index 8ffa95a83a..9e07b50c7b 100644
--- a/playground/pep8/wscript
+++ b/playground/pep8/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 from waflib.TaskGen import extension
diff --git a/playground/protoc/wscript b/playground/protoc/wscript
index a21e4f95fe..1011c91be1 100644
--- a/playground/protoc/wscript
+++ b/playground/protoc/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 top = '.'
 out = 'build'
diff --git a/playground/pyqt5/wscript b/playground/pyqt5/wscript
index 8a5379be6e..8dc5b2dfef 100644
--- a/playground/pyqt5/wscript
+++ b/playground/pyqt5/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8#
 # Federico Pellegrin, 2016 (fedepell)
 
diff --git a/playground/pytest/src/bar/bar.py b/playground/pytest/src/bar/bar.py
index 4fb91625a7..41679c4e8f 100644
--- a/playground/pytest/src/bar/bar.py
+++ b/playground/pytest/src/bar/bar.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2017 (xbreak)
 
diff --git a/playground/pytest/src/foo/foo.py b/playground/pytest/src/foo/foo.py
index 387397c86e..081249c0d4 100644
--- a/playground/pytest/src/foo/foo.py
+++ b/playground/pytest/src/foo/foo.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2016 (xbreak)
 
diff --git a/playground/pytest/test/test_bar.py b/playground/pytest/test/test_bar.py
index 71a2807186..6ecd77f73d 100644
--- a/playground/pytest/test/test_bar.py
+++ b/playground/pytest/test/test_bar.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2016 (xbreak)
 
diff --git a/playground/pytest/test/test_baz.py b/playground/pytest/test/test_baz.py
index 4f9a79a7a6..36b8614221 100644
--- a/playground/pytest/test/test_baz.py
+++ b/playground/pytest/test/test_baz.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2017 (xbreak)
 
diff --git a/playground/pytest/test/test_foo.py b/playground/pytest/test/test_foo.py
index 1dfc5bc517..69a6f71868 100644
--- a/playground/pytest/test/test_foo.py
+++ b/playground/pytest/test/test_foo.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2016 (xbreak)
 
diff --git a/playground/pytest/wscript b/playground/pytest/wscript
index f2dac3cf4f..78edff1ca5 100644
--- a/playground/pytest/wscript
+++ b/playground/pytest/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2016 (xbreak)
 
diff --git a/playground/qt4/wscript b/playground/qt4/wscript
index cd77700215..2b804eb633 100644
--- a/playground/qt4/wscript
+++ b/playground/qt4/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005, 2011 (ita)
 
diff --git a/playground/qt5-and-pyqt5/pyqt5/wscript b/playground/qt5-and-pyqt5/pyqt5/wscript
index 8a5379be6e..8dc5b2dfef 100644
--- a/playground/qt5-and-pyqt5/pyqt5/wscript
+++ b/playground/qt5-and-pyqt5/pyqt5/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8#
 # Federico Pellegrin, 2016 (fedepell)
 
diff --git a/playground/qt5-and-pyqt5/qt5/wscript b/playground/qt5-and-pyqt5/qt5/wscript
index 5ab374c916..4fdf4554ed 100644
--- a/playground/qt5-and-pyqt5/qt5/wscript
+++ b/playground/qt5-and-pyqt5/qt5/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016 (ita)
 
diff --git a/playground/qt5-and-pyqt5/qtchainer/qtchainer.py b/playground/qt5-and-pyqt5/qtchainer/qtchainer.py
index 55d4c08b43..eb34510897 100644
--- a/playground/qt5-and-pyqt5/qtchainer/qtchainer.py
+++ b/playground/qt5-and-pyqt5/qtchainer/qtchainer.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Federico Pellegrin, 2016 (fedepell)
 
diff --git a/playground/qt5-and-pyqt5/wscript b/playground/qt5-and-pyqt5/wscript
index cd679ea929..f1fd393f8f 100644
--- a/playground/qt5-and-pyqt5/wscript
+++ b/playground/qt5-and-pyqt5/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8#
 # Federico Pellegrin, 2016 (fedepell)
 
diff --git a/playground/redirect/wscript b/playground/redirect/wscript
index cf33f847b8..e64686581a 100644
--- a/playground/redirect/wscript
+++ b/playground/redirect/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Run: "waf configure clean build"
diff --git a/playground/relocate/c/wscript b/playground/relocate/c/wscript
index b1cc5b212b..d5df6ed7ed 100644
--- a/playground/relocate/c/wscript
+++ b/playground/relocate/c/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(opt):
 	opt.load('compiler_c')
diff --git a/playground/remote/wscript b/playground/remote/wscript
index c6d1e58709..938517c410 100644
--- a/playground/remote/wscript
+++ b/playground/remote/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Example using the `remote` tool.
 
diff --git a/playground/rst/wscript b/playground/rst/wscript
index f3f03a5605..85cb9d9bbe 100644
--- a/playground/rst/wscript
+++ b/playground/rst/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import os, re, subprocess
 from waflib import Options, TaskGen, Utils
diff --git a/playground/sas/wscript b/playground/sas/wscript
index 7514f3b6fe..ca0ab048ca 100644
--- a/playground/sas/wscript
+++ b/playground/sas/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 #  Mark Coggeshall 2010
 
diff --git a/playground/scala/wscript b/playground/scala/wscript
index 3b32ac94d4..99feba853e 100644
--- a/playground/scala/wscript
+++ b/playground/scala/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/playground/shrinking_sets/wscript b/playground/shrinking_sets/wscript
index d42a38a54b..666a4b17c7 100644
--- a/playground/shrinking_sets/wscript
+++ b/playground/shrinking_sets/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(ctx):
 	pass
diff --git a/playground/slow_qt/wscript b/playground/slow_qt/wscript
index 7335fc5065..680481bf30 100644
--- a/playground/slow_qt/wscript
+++ b/playground/slow_qt/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005, 2011 (ita)
 
diff --git a/playground/stale_files/wscript b/playground/stale_files/wscript
index 4b07637e7c..d20a8544d6 100644
--- a/playground/stale_files/wscript
+++ b/playground/stale_files/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2015 (ita)
 
diff --git a/playground/stpl_c_py_cs_satellite_wix/src/build.py b/playground/stpl_c_py_cs_satellite_wix/src/build.py
index 0eb984be8f..642bc1915b 100644
--- a/playground/stpl_c_py_cs_satellite_wix/src/build.py
+++ b/playground/stpl_c_py_cs_satellite_wix/src/build.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import sys
diff --git a/playground/stracedeps/wscript b/playground/stracedeps/wscript
index f86be658ae..936e8d090c 100644
--- a/playground/stracedeps/wscript
+++ b/playground/stracedeps/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2015 (ita)
 
diff --git a/playground/strip/strip.py b/playground/strip/strip.py
index a2df9d5e12..a25d56c9ef 100644
--- a/playground/strip/strip.py
+++ b/playground/strip/strip.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Strip a program/library after it is created.
diff --git a/playground/strip/strip_hack.py b/playground/strip/strip_hack.py
index 0e3ce83fca..b9903374d2 100644
--- a/playground/strip/strip_hack.py
+++ b/playground/strip/strip_hack.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 This is a hack; In general two tasks should not provide
diff --git a/playground/strip/strip_on_install.py b/playground/strip/strip_on_install.py
index 7dd93a9c04..e73eb758cc 100644
--- a/playground/strip/strip_on_install.py
+++ b/playground/strip/strip_on_install.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Strip executables upon installation
diff --git a/playground/strip/wscript b/playground/strip/wscript
index da96687334..00d11a56de 100644
--- a/playground/strip/wscript
+++ b/playground/strip/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(opt):
 	opt.load('compiler_c')
diff --git a/playground/swig/wscript b/playground/swig/wscript
index 64353b925f..1018351b44 100644
--- a/playground/swig/wscript
+++ b/playground/swig/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: UTF-8
 # Peter Forai
 # Thomas Nagy, 2008
diff --git a/playground/syms/wscript b/playground/syms/wscript
index ef10aa501c..b4bd804897 100644
--- a/playground/syms/wscript
+++ b/playground/syms/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(ctx):
 	ctx.load('compiler_c')
diff --git a/playground/test_fail/wscript b/playground/test_fail/wscript
index b0e79a5679..7e4c257ffc 100644
--- a/playground/test_fail/wscript
+++ b/playground/test_fail/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/playground/test_times/wscript b/playground/test_times/wscript
index ad7d75683b..6b41dfbc4c 100644
--- a/playground/test_times/wscript
+++ b/playground/test_times/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Create a few c programs, measure the execution times on "waf times"
diff --git a/playground/ticgt/wscript b/playground/ticgt/wscript
index 6d05952789..2a1c8abf75 100644
--- a/playground/ticgt/wscript
+++ b/playground/ticgt/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero, 2012 (zougloub)
 # Put this file in ti-dsplink-tree/dsplink/dsp/src/samples/message
diff --git a/playground/top_eq_out/wscript b/playground/top_eq_out/wscript
index 88bd3494b9..f29f4990f2 100644
--- a/playground/top_eq_out/wscript
+++ b/playground/top_eq_out/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/playground/track_output_files/wscript b/playground/track_output_files/wscript
index ef4edfe694..7477f9024c 100644
--- a/playground/track_output_files/wscript
+++ b/playground/track_output_files/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2015 (ita)
 
diff --git a/playground/unity/wscript b/playground/unity/wscript
index 7993ca4bbf..043b748b38 100644
--- a/playground/unity/wscript
+++ b/playground/unity/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(opt):
 	opt.load('compiler_c')
diff --git a/playground/updates/wscript b/playground/updates/wscript
index 335d6b3186..214e3a4136 100644
--- a/playground/updates/wscript
+++ b/playground/updates/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 An example to show how multiple tasks can modify the same file
diff --git a/playground/use/objects/lib/wscript b/playground/use/objects/lib/wscript
index 38fd984aac..af80534cf5 100644
--- a/playground/use/objects/lib/wscript
+++ b/playground/use/objects/lib/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 INCLUDES = [
     '.'
diff --git a/playground/use/objects/libex/wscript b/playground/use/objects/libex/wscript
index fb0ebcf9fa..94093ee2e2 100644
--- a/playground/use/objects/libex/wscript
+++ b/playground/use/objects/libex/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 
 INCLUDES = [
diff --git a/playground/use/wscript b/playground/use/wscript
index 58746b01c1..850a271f84 100644
--- a/playground/use/wscript
+++ b/playground/use/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 def options(ctx):
 	ctx.load('compiler_c')
diff --git a/playground/xcode6/wscript b/playground/xcode6/wscript
index f1423257b3..9320f8be36 100644
--- a/playground/xcode6/wscript
+++ b/playground/xcode6/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 from waflib import Task, TaskGen
diff --git a/playground/xilinx-ise/wscript b/playground/xilinx-ise/wscript
index e8b56ad478..e4f77266a0 100644
--- a/playground/xilinx-ise/wscript
+++ b/playground/xilinx-ise/wscript
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # waf example, builds a Xilinx FPGA bitstream
 
diff --git a/tests/config/wscript b/tests/config/wscript
index baa352daff..c65eb21d9e 100644
--- a/tests/config/wscript
+++ b/tests/config/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 from waflib.Logs import pprint
diff --git a/tests/defines/wscript b/tests/defines/wscript
index 950af6c5a1..ddded120c4 100644
--- a/tests/defines/wscript
+++ b/tests/defines/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 top = '.'
 out = 'build'
diff --git a/tests/different_top/wscript b/tests/different_top/wscript
index 5ae6378245..78b6b73bc2 100644
--- a/tests/different_top/wscript
+++ b/tests/different_top/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 top = '../diff_top_src'
 out = 'build'
diff --git a/tests/general/wscript b/tests/general/wscript
index eab051cf96..a1310fa79f 100644
--- a/tests/general/wscript
+++ b/tests/general/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016 (ita)
 
diff --git a/tests/headers/wscript b/tests/headers/wscript
index 743a785383..6dd563cc28 100644
--- a/tests/headers/wscript
+++ b/tests/headers/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/tests/init/wscript b/tests/init/wscript
index 6578dac53b..35a0289670 100644
--- a/tests/init/wscript
+++ b/tests/init/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 top = '.'
 out = 'build'
diff --git a/tests/install/wscript b/tests/install/wscript
index 718f796dc1..5e9fa64ab6 100644
--- a/tests/install/wscript
+++ b/tests/install/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016
 #
diff --git a/tests/install_group/wscript b/tests/install_group/wscript
index 0b26a899d6..869d4de433 100644
--- a/tests/install_group/wscript
+++ b/tests/install_group/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 from waflib import Utils, Build, Logs
 import os
diff --git a/tests/post/wscript b/tests/post/wscript
index b88c8f1305..cddb5fa33c 100644
--- a/tests/post/wscript
+++ b/tests/post/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016-2018 (ita)
 
diff --git a/tests/preproc/wscript b/tests/preproc/wscript
index 8b6a5c1d28..5e88c08e68 100644
--- a/tests/preproc/wscript
+++ b/tests/preproc/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2012 (ita)
 
diff --git a/tests/utils/wscript b/tests/utils/wscript
index 0d4ee976dd..a276a36e9b 100644
--- a/tests/utils/wscript
+++ b/tests/utils/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2012 (ita)
 
diff --git a/utils/genbench.py b/utils/genbench.py
index d68ec6fda7..11210d556c 100755
--- a/utils/genbench.py
+++ b/utils/genbench.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import sys
diff --git a/utils/sign_file.py b/utils/sign_file.py
index 41c5afc5d0..be56b46160 100755
--- a/utils/sign_file.py
+++ b/utils/sign_file.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 """
 A script that creates signed Python files.
diff --git a/utils/verify-sig.py b/utils/verify-sig.py
index b555add27f..fa3b61dca3 100755
--- a/utils/verify-sig.py
+++ b/utils/verify-sig.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2014-2015
 
diff --git a/waflib/Build.py b/waflib/Build.py
index 772c66f60c..41aa801787 100644
--- a/waflib/Build.py
+++ b/waflib/Build.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/ConfigSet.py b/waflib/ConfigSet.py
index 84736c9c87..554b59420e 100644
--- a/waflib/ConfigSet.py
+++ b/waflib/ConfigSet.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Configure.py b/waflib/Configure.py
index 20ca705e69..b506a4c73e 100644
--- a/waflib/Configure.py
+++ b/waflib/Configure.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Context.py b/waflib/Context.py
index 204d2a3051..d2c1d3ee91 100644
--- a/waflib/Context.py
+++ b/waflib/Context.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010-2018 (ita)
 
diff --git a/waflib/Errors.py b/waflib/Errors.py
index bf75c1b661..5617f88646 100644
--- a/waflib/Errors.py
+++ b/waflib/Errors.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010-2018 (ita)
 
diff --git a/waflib/Logs.py b/waflib/Logs.py
index 2a475169b9..d8d5584441 100644
--- a/waflib/Logs.py
+++ b/waflib/Logs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Node.py b/waflib/Node.py
index 237d75e463..9b868d2504 100644
--- a/waflib/Node.py
+++ b/waflib/Node.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Options.py b/waflib/Options.py
index ad802d4b90..c4c266dadf 100644
--- a/waflib/Options.py
+++ b/waflib/Options.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Scott Newton, 2005 (scottn)
 # Thomas Nagy, 2006-2018 (ita)
diff --git a/waflib/Runner.py b/waflib/Runner.py
index 7535c83de9..168bcf8513 100644
--- a/waflib/Runner.py
+++ b/waflib/Runner.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Scripting.py b/waflib/Scripting.py
index 18203d5270..107d09ae17 100644
--- a/waflib/Scripting.py
+++ b/waflib/Scripting.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Task.py b/waflib/Task.py
index c358ce4796..e846e6a516 100644
--- a/waflib/Task.py
+++ b/waflib/Task.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/TaskGen.py b/waflib/TaskGen.py
index 40007b55ca..4c69ef3861 100644
--- a/waflib/TaskGen.py
+++ b/waflib/TaskGen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Tools/__init__.py b/waflib/Tools/__init__.py
index 079df358f5..c93ca405eb 100644
--- a/waflib/Tools/__init__.py
+++ b/waflib/Tools/__init__.py
@@ -1,3 +1,3 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
diff --git a/waflib/Tools/ar.py b/waflib/Tools/ar.py
index b39b645926..f7b880ac8b 100644
--- a/waflib/Tools/ar.py
+++ b/waflib/Tools/ar.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Tools/asm.py b/waflib/Tools/asm.py
index b6f26fb3df..da42ecf40d 100644
--- a/waflib/Tools/asm.py
+++ b/waflib/Tools/asm.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2008-2018 (ita)
 
diff --git a/waflib/Tools/bison.py b/waflib/Tools/bison.py
index eef56dcdd7..7138d696c1 100644
--- a/waflib/Tools/bison.py
+++ b/waflib/Tools/bison.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # John O'Meara, 2006
 # Thomas Nagy 2009-2018 (ita)
diff --git a/waflib/Tools/c.py b/waflib/Tools/c.py
index be7c746d71..0ca9459cb7 100644
--- a/waflib/Tools/c.py
+++ b/waflib/Tools/c.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/c_aliases.py b/waflib/Tools/c_aliases.py
index c9d53692e8..40913416eb 100644
--- a/waflib/Tools/c_aliases.py
+++ b/waflib/Tools/c_aliases.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2015 (ita)
 
diff --git a/waflib/Tools/c_config.py b/waflib/Tools/c_config.py
index 41b53ae7b2..042dd36719 100644
--- a/waflib/Tools/c_config.py
+++ b/waflib/Tools/c_config.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Tools/c_osx.py b/waflib/Tools/c_osx.py
index f70b128b87..9e26b25d6e 100644
--- a/waflib/Tools/c_osx.py
+++ b/waflib/Tools/c_osx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy 2008-2018 (ita)
 
diff --git a/waflib/Tools/c_preproc.py b/waflib/Tools/c_preproc.py
index c2c239baa2..d94c29d193 100644
--- a/waflib/Tools/c_preproc.py
+++ b/waflib/Tools/c_preproc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/c_tests.py b/waflib/Tools/c_tests.py
index f858df5763..d3d7fcff8e 100644
--- a/waflib/Tools/c_tests.py
+++ b/waflib/Tools/c_tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016-2018 (ita)
 
diff --git a/waflib/Tools/ccroot.py b/waflib/Tools/ccroot.py
index 394f36b8e1..1beb03815d 100644
--- a/waflib/Tools/ccroot.py
+++ b/waflib/Tools/ccroot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Tools/clang.py b/waflib/Tools/clang.py
index 3828e39118..e9ba039e79 100644
--- a/waflib/Tools/clang.py
+++ b/waflib/Tools/clang.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Krzysztof Kosiński 2014
 
diff --git a/waflib/Tools/clangxx.py b/waflib/Tools/clangxx.py
index 152013ce7a..da39ccfbfb 100644
--- a/waflib/Tools/clangxx.py
+++ b/waflib/Tools/clangxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy 2009-2018 (ita)
 
diff --git a/waflib/Tools/compiler_c.py b/waflib/Tools/compiler_c.py
index 2dba3f8270..a4a1c747e5 100644
--- a/waflib/Tools/compiler_c.py
+++ b/waflib/Tools/compiler_c.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Matthias Jahn jahn dôt matthias ât freenet dôt de, 2007 (pmarat)
 
diff --git a/waflib/Tools/compiler_cxx.py b/waflib/Tools/compiler_cxx.py
index 1af65a226d..eae8452f76 100644
--- a/waflib/Tools/compiler_cxx.py
+++ b/waflib/Tools/compiler_cxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Matthias Jahn jahn dôt matthias ât freenet dôt de 2007 (pmarat)
 
diff --git a/waflib/Tools/compiler_d.py b/waflib/Tools/compiler_d.py
index 43bb1f646a..9bee01576d 100644
--- a/waflib/Tools/compiler_d.py
+++ b/waflib/Tools/compiler_d.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Carlos Rafael Giani, 2007 (dv)
 # Thomas Nagy, 2016-2018 (ita)
diff --git a/waflib/Tools/compiler_fc.py b/waflib/Tools/compiler_fc.py
index 96b58e706f..edd7a5b34b 100644
--- a/waflib/Tools/compiler_fc.py
+++ b/waflib/Tools/compiler_fc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import re
diff --git a/waflib/Tools/cs.py b/waflib/Tools/cs.py
index aecca6da13..a3506b091b 100644
--- a/waflib/Tools/cs.py
+++ b/waflib/Tools/cs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/cxx.py b/waflib/Tools/cxx.py
index 705ec74d06..98393f835c 100644
--- a/waflib/Tools/cxx.py
+++ b/waflib/Tools/cxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/Tools/d.py b/waflib/Tools/d.py
index e4cf73bb4a..46ba357f92 100644
--- a/waflib/Tools/d.py
+++ b/waflib/Tools/d.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Carlos Rafael Giani, 2007 (dv)
 # Thomas Nagy, 2007-2018 (ita)
diff --git a/waflib/Tools/d_config.py b/waflib/Tools/d_config.py
index 6637556524..d6f6b0aa54 100644
--- a/waflib/Tools/d_config.py
+++ b/waflib/Tools/d_config.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016-2018 (ita)
 
diff --git a/waflib/Tools/d_scan.py b/waflib/Tools/d_scan.py
index 14c6c313e9..4c9e2f7b26 100644
--- a/waflib/Tools/d_scan.py
+++ b/waflib/Tools/d_scan.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016-2018 (ita)
 
diff --git a/waflib/Tools/dbus.py b/waflib/Tools/dbus.py
index d520f1c0f2..48157e3a44 100644
--- a/waflib/Tools/dbus.py
+++ b/waflib/Tools/dbus.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Ali Sabil, 2007
 
diff --git a/waflib/Tools/dmd.py b/waflib/Tools/dmd.py
index 8917ca1b3f..8499e05c65 100644
--- a/waflib/Tools/dmd.py
+++ b/waflib/Tools/dmd.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Carlos Rafael Giani, 2007 (dv)
 # Thomas Nagy, 2008-2018 (ita)
diff --git a/waflib/Tools/errcheck.py b/waflib/Tools/errcheck.py
index de8d75a42b..6f744efeb5 100644
--- a/waflib/Tools/errcheck.py
+++ b/waflib/Tools/errcheck.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/waflib/Tools/fc.py b/waflib/Tools/fc.py
index 621eb5029d..a0b3e372fd 100644
--- a/waflib/Tools/fc.py
+++ b/waflib/Tools/fc.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/fc_config.py b/waflib/Tools/fc_config.py
index 0df460b5d1..62d5b67c87 100644
--- a/waflib/Tools/fc_config.py
+++ b/waflib/Tools/fc_config.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/fc_scan.py b/waflib/Tools/fc_scan.py
index 12cb0fc041..db0d0eb61c 100644
--- a/waflib/Tools/fc_scan.py
+++ b/waflib/Tools/fc_scan.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/flex.py b/waflib/Tools/flex.py
index 2256657b6a..562b9312ba 100644
--- a/waflib/Tools/flex.py
+++ b/waflib/Tools/flex.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # John O'Meara, 2006
 # Thomas Nagy, 2006-2018 (ita)
diff --git a/waflib/Tools/g95.py b/waflib/Tools/g95.py
index f69ba4f367..25f5291794 100644
--- a/waflib/Tools/g95.py
+++ b/waflib/Tools/g95.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # KWS 2010
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/gas.py b/waflib/Tools/gas.py
index 77afed7038..4eafff2770 100644
--- a/waflib/Tools/gas.py
+++ b/waflib/Tools/gas.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2008-2018 (ita)
 
diff --git a/waflib/Tools/gcc.py b/waflib/Tools/gcc.py
index 2bda5f5242..9c8b942cdd 100644
--- a/waflib/Tools/gcc.py
+++ b/waflib/Tools/gcc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Tools/gdc.py b/waflib/Tools/gdc.py
index d89a66d306..93a15bd58b 100644
--- a/waflib/Tools/gdc.py
+++ b/waflib/Tools/gdc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Carlos Rafael Giani, 2007 (dv)
 
diff --git a/waflib/Tools/gfortran.py b/waflib/Tools/gfortran.py
index 1050667315..6938bbae3d 100644
--- a/waflib/Tools/gfortran.py
+++ b/waflib/Tools/gfortran.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/glib2.py b/waflib/Tools/glib2.py
index 949fe37c3b..c82242d9aa 100644
--- a/waflib/Tools/glib2.py
+++ b/waflib/Tools/glib2.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/gnu_dirs.py b/waflib/Tools/gnu_dirs.py
index 2847071d17..36b4cdc4fb 100644
--- a/waflib/Tools/gnu_dirs.py
+++ b/waflib/Tools/gnu_dirs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Ali Sabil, 2007
 
diff --git a/waflib/Tools/gxx.py b/waflib/Tools/gxx.py
index 2667258197..f4671f9c8d 100644
--- a/waflib/Tools/gxx.py
+++ b/waflib/Tools/gxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Tools/icc.py b/waflib/Tools/icc.py
index b6492c8e1a..d337edba15 100644
--- a/waflib/Tools/icc.py
+++ b/waflib/Tools/icc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Stian Selnes 2008
 # Thomas Nagy 2009-2018 (ita)
diff --git a/waflib/Tools/icpc.py b/waflib/Tools/icpc.py
index 8a6cc6c40f..f4461fd02f 100644
--- a/waflib/Tools/icpc.py
+++ b/waflib/Tools/icpc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy 2009-2018 (ita)
 
diff --git a/waflib/Tools/ifort.py b/waflib/Tools/ifort.py
index 74934f3f66..2c8abd6edc 100644
--- a/waflib/Tools/ifort.py
+++ b/waflib/Tools/ifort.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # DC 2008
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/intltool.py b/waflib/Tools/intltool.py
index af95ba80ed..35d44bf149 100644
--- a/waflib/Tools/intltool.py
+++ b/waflib/Tools/intltool.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/irixcc.py b/waflib/Tools/irixcc.py
index c3ae1ac915..a21720fce6 100644
--- a/waflib/Tools/irixcc.py
+++ b/waflib/Tools/irixcc.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # imported from samba
 
diff --git a/waflib/Tools/javaw.py b/waflib/Tools/javaw.py
index f6fd20cc68..398e2f9703 100644
--- a/waflib/Tools/javaw.py
+++ b/waflib/Tools/javaw.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/ldc2.py b/waflib/Tools/ldc2.py
index a51c344b95..6676e1a6e4 100644
--- a/waflib/Tools/ldc2.py
+++ b/waflib/Tools/ldc2.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Alex Rønne Petersen, 2012 (alexrp/Zor)
 
diff --git a/waflib/Tools/lua.py b/waflib/Tools/lua.py
index 15a333a995..39878dcc11 100644
--- a/waflib/Tools/lua.py
+++ b/waflib/Tools/lua.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Sebastian Schlingmann, 2008
 # Thomas Nagy, 2008-2018 (ita)
diff --git a/waflib/Tools/md5_tstamp.py b/waflib/Tools/md5_tstamp.py
index 6428e46024..b85c5752ea 100644
--- a/waflib/Tools/md5_tstamp.py
+++ b/waflib/Tools/md5_tstamp.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/Tools/msvc.py b/waflib/Tools/msvc.py
index 17b347d458..eac55f3bdd 100644
--- a/waflib/Tools/msvc.py
+++ b/waflib/Tools/msvc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Carlos Rafael Giani, 2006 (dv)
 # Tamas Pal, 2007 (folti)
diff --git a/waflib/Tools/nasm.py b/waflib/Tools/nasm.py
index 411d5826b5..3330974ac5 100644
--- a/waflib/Tools/nasm.py
+++ b/waflib/Tools/nasm.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2008-2018 (ita)
 
diff --git a/waflib/Tools/nobuild.py b/waflib/Tools/nobuild.py
index 2e4b055ec7..6c0996065f 100644
--- a/waflib/Tools/nobuild.py
+++ b/waflib/Tools/nobuild.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2015 (ita)
 
diff --git a/waflib/Tools/perl.py b/waflib/Tools/perl.py
index 32b03fbaa7..ab302731ed 100644
--- a/waflib/Tools/perl.py
+++ b/waflib/Tools/perl.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # andersg at 0x63.nu 2007
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/python.py b/waflib/Tools/python.py
index 25841d03cf..c08f19d832 100644
--- a/waflib/Tools/python.py
+++ b/waflib/Tools/python.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2007-2015 (ita)
 # Gustavo Carneiro (gjc), 2007
diff --git a/waflib/Tools/qt5.py b/waflib/Tools/qt5.py
index 4f9c6908fc..6ab4468d7c 100644
--- a/waflib/Tools/qt5.py
+++ b/waflib/Tools/qt5.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/ruby.py b/waflib/Tools/ruby.py
index 8d92a79a16..d2393b99be 100644
--- a/waflib/Tools/ruby.py
+++ b/waflib/Tools/ruby.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # daniel.svensson at purplescout.se 2008
 # Thomas Nagy 2016-2018 (ita)
diff --git a/waflib/Tools/suncc.py b/waflib/Tools/suncc.py
index 33d34fc9ea..2c3e605e96 100644
--- a/waflib/Tools/suncc.py
+++ b/waflib/Tools/suncc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Tools/suncxx.py b/waflib/Tools/suncxx.py
index 3b384f6f99..0a86134e6b 100644
--- a/waflib/Tools/suncxx.py
+++ b/waflib/Tools/suncxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Tools/tex.py b/waflib/Tools/tex.py
index eaf9fdb580..0a3a6396ef 100644
--- a/waflib/Tools/tex.py
+++ b/waflib/Tools/tex.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 
diff --git a/waflib/Tools/vala.py b/waflib/Tools/vala.py
index 822ec502e0..d1c707bd90 100644
--- a/waflib/Tools/vala.py
+++ b/waflib/Tools/vala.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Ali Sabil, 2007
 # Radosław Szkodziński, 2010
diff --git a/waflib/Tools/waf_unit_test.py b/waflib/Tools/waf_unit_test.py
index a71ed1c090..e641fcd43a 100644
--- a/waflib/Tools/waf_unit_test.py
+++ b/waflib/Tools/waf_unit_test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Carlos Rafael Giani, 2006
 # Thomas Nagy, 2010-2018 (ita)
diff --git a/waflib/Tools/winres.py b/waflib/Tools/winres.py
index 586c596cf9..79e40c3405 100644
--- a/waflib/Tools/winres.py
+++ b/waflib/Tools/winres.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Brant Young, 2007
 
diff --git a/waflib/Tools/xlc.py b/waflib/Tools/xlc.py
index 134dd4152d..2790f370c8 100644
--- a/waflib/Tools/xlc.py
+++ b/waflib/Tools/xlc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Tools/xlcxx.py b/waflib/Tools/xlcxx.py
index 76aa59bc91..3684653df6 100644
--- a/waflib/Tools/xlcxx.py
+++ b/waflib/Tools/xlcxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2018 (ita)
 # Ralf Habacker, 2006 (rh)
diff --git a/waflib/Utils.py b/waflib/Utils.py
index b4665c4dc2..55debe7b90 100644
--- a/waflib/Utils.py
+++ b/waflib/Utils.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
 
diff --git a/waflib/__init__.py b/waflib/__init__.py
index 079df358f5..c93ca405eb 100644
--- a/waflib/__init__.py
+++ b/waflib/__init__.py
@@ -1,3 +1,3 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018 (ita)
diff --git a/waflib/ansiterm.py b/waflib/ansiterm.py
index 0d20c6374b..06ffd821b2 100644
--- a/waflib/ansiterm.py
+++ b/waflib/ansiterm.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/__init__.py b/waflib/extras/__init__.py
index c8a3c34928..4c8e350c17 100644
--- a/waflib/extras/__init__.py
+++ b/waflib/extras/__init__.py
@@ -1,3 +1,3 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2010 (ita)
diff --git a/waflib/extras/batched_cc.py b/waflib/extras/batched_cc.py
index aad2872298..aa63de7590 100644
--- a/waflib/extras/batched_cc.py
+++ b/waflib/extras/batched_cc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2015 (ita)
 
diff --git a/waflib/extras/biber.py b/waflib/extras/biber.py
index fd9db4e04e..f18e23dd8f 100644
--- a/waflib/extras/biber.py
+++ b/waflib/extras/biber.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/waflib/extras/bjam.py b/waflib/extras/bjam.py
index 8e04d3a66f..9c460c9d3f 100644
--- a/waflib/extras/bjam.py
+++ b/waflib/extras/bjam.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # per rosengren 2011
 
 from os import sep, readlink
diff --git a/waflib/extras/blender.py b/waflib/extras/blender.py
index e5efc280cf..8763993a49 100644
--- a/waflib/extras/blender.py
+++ b/waflib/extras/blender.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Michal Proszek, 2014 (poxip)
 
diff --git a/waflib/extras/boo.py b/waflib/extras/boo.py
index 06623d40fd..b8380d78c3 100644
--- a/waflib/extras/boo.py
+++ b/waflib/extras/boo.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Yannick LM 2011
 
diff --git a/waflib/extras/boost.py b/waflib/extras/boost.py
index c2aaaa938a..e9f002d6ff 100644
--- a/waflib/extras/boost.py
+++ b/waflib/extras/boost.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 #
 # partially based on boost.py written by Gernot Vormayr
diff --git a/waflib/extras/build_file_tracker.py b/waflib/extras/build_file_tracker.py
index c4f26fd070..c65378d95b 100644
--- a/waflib/extras/build_file_tracker.py
+++ b/waflib/extras/build_file_tracker.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2015
 
diff --git a/waflib/extras/build_logs.py b/waflib/extras/build_logs.py
index cdf8ed097e..930f9eb747 100644
--- a/waflib/extras/build_logs.py
+++ b/waflib/extras/build_logs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2013 (ita)
 
diff --git a/waflib/extras/buildcopy.py b/waflib/extras/buildcopy.py
index a6d9ac8311..b215583771 100644
--- a/waflib/extras/buildcopy.py
+++ b/waflib/extras/buildcopy.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2017 (xbreak)
 """
diff --git a/waflib/extras/c_bgxlc.py b/waflib/extras/c_bgxlc.py
index 6e3eaf7bb6..c5084fa8eb 100644
--- a/waflib/extras/c_bgxlc.py
+++ b/waflib/extras/c_bgxlc.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/c_dumbpreproc.py b/waflib/extras/c_dumbpreproc.py
index ce9e1a400b..48389132d9 100644
--- a/waflib/extras/c_dumbpreproc.py
+++ b/waflib/extras/c_dumbpreproc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/waflib/extras/c_emscripten.py b/waflib/extras/c_emscripten.py
index e1ac494f44..898e56d2cc 100644
--- a/waflib/extras/c_emscripten.py
+++ b/waflib/extras/c_emscripten.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 vi:ts=4:noexpandtab
 
 import subprocess, shlex, sys
diff --git a/waflib/extras/c_nec.py b/waflib/extras/c_nec.py
index 96bfae4f34..390495b615 100644
--- a/waflib/extras/c_nec.py
+++ b/waflib/extras/c_nec.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/cabal.py b/waflib/extras/cabal.py
index e10a0d1129..fc0f76a493 100644
--- a/waflib/extras/cabal.py
+++ b/waflib/extras/cabal.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Anton Feldmann, 2012
 # "Base for cabal"
diff --git a/waflib/extras/clang_compilation_database.py b/waflib/extras/clang_compilation_database.py
index 4d9b5e275a..26b884e653 100644
--- a/waflib/extras/clang_compilation_database.py
+++ b/waflib/extras/clang_compilation_database.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Christoph Koke, 2013
 
diff --git a/waflib/extras/codelite.py b/waflib/extras/codelite.py
index 523302c05c..ce19d81782 100644
--- a/waflib/extras/codelite.py
+++ b/waflib/extras/codelite.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # CodeLite Project
 # Christian Klein (chrikle@berlios.de)
diff --git a/waflib/extras/color_gcc.py b/waflib/extras/color_gcc.py
index b68c5ebf2d..9a1545443b 100644
--- a/waflib/extras/color_gcc.py
+++ b/waflib/extras/color_gcc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 # Replaces the default formatter by one which understands GCC output and colorizes it.
diff --git a/waflib/extras/color_rvct.py b/waflib/extras/color_rvct.py
index f89ccbdb14..7931f4fdaf 100644
--- a/waflib/extras/color_rvct.py
+++ b/waflib/extras/color_rvct.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 # Replaces the default formatter by one which understands RVCT output and colorizes it.
diff --git a/waflib/extras/compat15.py b/waflib/extras/compat15.py
index 0e74df8506..71d362d049 100644
--- a/waflib/extras/compat15.py
+++ b/waflib/extras/compat15.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/waflib/extras/cppcheck.py b/waflib/extras/cppcheck.py
index 43dc544df7..f41b3b2bc0 100644
--- a/waflib/extras/cppcheck.py
+++ b/waflib/extras/cppcheck.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # -*- encoding: utf-8 -*-
 # Michel Mooij, michel.mooij7@gmail.com
 
diff --git a/waflib/extras/cpplint.py b/waflib/extras/cpplint.py
index fc914c2450..536233fce9 100644
--- a/waflib/extras/cpplint.py
+++ b/waflib/extras/cpplint.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 #
 # written by Sylvain Rouquette, 2014
diff --git a/waflib/extras/cython.py b/waflib/extras/cython.py
index 481d6f4c34..2bebecb292 100644
--- a/waflib/extras/cython.py
+++ b/waflib/extras/cython.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010-2015
 
diff --git a/waflib/extras/dcc.py b/waflib/extras/dcc.py
index c1a57c04d9..bcd93512de 100644
--- a/waflib/extras/dcc.py
+++ b/waflib/extras/dcc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero, 2011 (zougloub)
 
diff --git a/waflib/extras/distnet.py b/waflib/extras/distnet.py
index 09a31a6d43..0cee3931e0 100644
--- a/waflib/extras/distnet.py
+++ b/waflib/extras/distnet.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/doxygen.py b/waflib/extras/doxygen.py
index 28f56e9c7d..083f0e58d1 100644
--- a/waflib/extras/doxygen.py
+++ b/waflib/extras/doxygen.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: UTF-8
 # Thomas Nagy 2008-2010 (ita)
 
diff --git a/waflib/extras/dpapi.py b/waflib/extras/dpapi.py
index b94d482358..f322cdf59c 100644
--- a/waflib/extras/dpapi.py
+++ b/waflib/extras/dpapi.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Matt Clarkson, 2012
 
diff --git a/waflib/extras/eclipse.py b/waflib/extras/eclipse.py
index bb787416e9..6d4c0de18d 100644
--- a/waflib/extras/eclipse.py
+++ b/waflib/extras/eclipse.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Eclipse CDT 5.0 generator for Waf
 # Richard Quirk 2009-1011 (New BSD License)
diff --git a/waflib/extras/erlang.py b/waflib/extras/erlang.py
index 49f6d5b475..d0a633bfec 100644
--- a/waflib/extras/erlang.py
+++ b/waflib/extras/erlang.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 # Przemyslaw Rzepecki, 2016
diff --git a/waflib/extras/fast_partial.py b/waflib/extras/fast_partial.py
index b3af513b25..f765435066 100644
--- a/waflib/extras/fast_partial.py
+++ b/waflib/extras/fast_partial.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2017-2018 (ita)
 
diff --git a/waflib/extras/fc_bgxlf.py b/waflib/extras/fc_bgxlf.py
index cca18101ea..b15fec8b87 100644
--- a/waflib/extras/fc_bgxlf.py
+++ b/waflib/extras/fc_bgxlf.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_cray.py b/waflib/extras/fc_cray.py
index ec2906742b..13de701f63 100644
--- a/waflib/extras/fc_cray.py
+++ b/waflib/extras/fc_cray.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_nag.py b/waflib/extras/fc_nag.py
index edcb218bc3..40ed8b0628 100644
--- a/waflib/extras/fc_nag.py
+++ b/waflib/extras/fc_nag.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_nec.py b/waflib/extras/fc_nec.py
index 4b70f3dccc..40342be9cb 100644
--- a/waflib/extras/fc_nec.py
+++ b/waflib/extras/fc_nec.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_open64.py b/waflib/extras/fc_open64.py
index 413719f43e..8be657df1f 100644
--- a/waflib/extras/fc_open64.py
+++ b/waflib/extras/fc_open64.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_pgfortran.py b/waflib/extras/fc_pgfortran.py
index afb2817ba6..196280d91b 100644
--- a/waflib/extras/fc_pgfortran.py
+++ b/waflib/extras/fc_pgfortran.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_solstudio.py b/waflib/extras/fc_solstudio.py
index 53766df8fc..e7a78c1b0c 100644
--- a/waflib/extras/fc_solstudio.py
+++ b/waflib/extras/fc_solstudio.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/fc_xlf.py b/waflib/extras/fc_xlf.py
index 5a3da03418..660208dbce 100644
--- a/waflib/extras/fc_xlf.py
+++ b/waflib/extras/fc_xlf.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # harald at klimachs.de
 
diff --git a/waflib/extras/freeimage.py b/waflib/extras/freeimage.py
index f27e5258dd..f087258e7f 100644
--- a/waflib/extras/freeimage.py
+++ b/waflib/extras/freeimage.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 #
 # written by Sylvain Rouquette, 2011
diff --git a/waflib/extras/fsb.py b/waflib/extras/fsb.py
index 1b8f398feb..fc964d4ea1 100644
--- a/waflib/extras/fsb.py
+++ b/waflib/extras/fsb.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/waflib/extras/fsc.py b/waflib/extras/fsc.py
index c67e70be29..f0e83cdd19 100644
--- a/waflib/extras/fsc.py
+++ b/waflib/extras/fsc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/waflib/extras/gccdeps.py b/waflib/extras/gccdeps.py
index 0dd07fd039..f2e8efbd68 100644
--- a/waflib/extras/gccdeps.py
+++ b/waflib/extras/gccdeps.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2008-2010 (ita)
 
diff --git a/waflib/extras/gdbus.py b/waflib/extras/gdbus.py
index 0e0476e301..d7c83d50d7 100644
--- a/waflib/extras/gdbus.py
+++ b/waflib/extras/gdbus.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Copyright Garmin International or its subsidiaries, 2018
 #
diff --git a/waflib/extras/gob2.py b/waflib/extras/gob2.py
index b4fa3b9a72..551589e2b8 100644
--- a/waflib/extras/gob2.py
+++ b/waflib/extras/gob2.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Ali Sabil, 2007
 
diff --git a/waflib/extras/javatest.py b/waflib/extras/javatest.py
index 979b8d8242..630aceb9aa 100755
--- a/waflib/extras/javatest.py
+++ b/waflib/extras/javatest.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Federico Pellegrin, 2017 (fedepell)
 
diff --git a/waflib/extras/kde4.py b/waflib/extras/kde4.py
index e49a9ec00e..fe8f254663 100644
--- a/waflib/extras/kde4.py
+++ b/waflib/extras/kde4.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/waflib/extras/local_rpath.py b/waflib/extras/local_rpath.py
index b2507e17a1..ca67636926 100644
--- a/waflib/extras/local_rpath.py
+++ b/waflib/extras/local_rpath.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/waflib/extras/make.py b/waflib/extras/make.py
index 933d9cacb2..a716c6c0c3 100644
--- a/waflib/extras/make.py
+++ b/waflib/extras/make.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011 (ita)
 
diff --git a/waflib/extras/midl.py b/waflib/extras/midl.py
index 43e6cf911f..779441da50 100644
--- a/waflib/extras/midl.py
+++ b/waflib/extras/midl.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Issue 1185 ultrix gmail com
 
 """
diff --git a/waflib/extras/msvcdeps.py b/waflib/extras/msvcdeps.py
index fc1ecd4d08..a11809e1cf 100644
--- a/waflib/extras/msvcdeps.py
+++ b/waflib/extras/msvcdeps.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Copyright Garmin International or its subsidiaries, 2012-2013
 
diff --git a/waflib/extras/msvs.py b/waflib/extras/msvs.py
index 8aa2db0b75..fb59aec422 100644
--- a/waflib/extras/msvs.py
+++ b/waflib/extras/msvs.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Avalanche Studios 2009-2011
 # Thomas Nagy 2011
diff --git a/waflib/extras/netcache_client.py b/waflib/extras/netcache_client.py
index dc490485ac..7879f59051 100644
--- a/waflib/extras/netcache_client.py
+++ b/waflib/extras/netcache_client.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011-2015 (ita)
 
diff --git a/waflib/extras/ocaml.py b/waflib/extras/ocaml.py
index afe73c0ca3..10f4b4e307 100644
--- a/waflib/extras/ocaml.py
+++ b/waflib/extras/ocaml.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/waflib/extras/package.py b/waflib/extras/package.py
index c06498eba8..a336dca6bb 100644
--- a/waflib/extras/package.py
+++ b/waflib/extras/package.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2011
 
diff --git a/waflib/extras/parallel_debug.py b/waflib/extras/parallel_debug.py
index 35883a3dd7..4051e21bb6 100644
--- a/waflib/extras/parallel_debug.py
+++ b/waflib/extras/parallel_debug.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2007-2010 (ita)
 
diff --git a/waflib/extras/pch.py b/waflib/extras/pch.py
index 103e752838..63775d009f 100644
--- a/waflib/extras/pch.py
+++ b/waflib/extras/pch.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Alexander Afanasyev (UCLA), 2014
 
diff --git a/waflib/extras/pep8.py b/waflib/extras/pep8.py
index 676beedb25..1fac3da88a 100644
--- a/waflib/extras/pep8.py
+++ b/waflib/extras/pep8.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 #
 # written by Sylvain Rouquette, 2011
diff --git a/waflib/extras/pgicc.py b/waflib/extras/pgicc.py
index 9790b9cf8b..94b87ddd5d 100644
--- a/waflib/extras/pgicc.py
+++ b/waflib/extras/pgicc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Antoine Dechaume 2011
 
diff --git a/waflib/extras/pgicxx.py b/waflib/extras/pgicxx.py
index eae121c403..5158e461f1 100644
--- a/waflib/extras/pgicxx.py
+++ b/waflib/extras/pgicxx.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Antoine Dechaume 2011
 
diff --git a/waflib/extras/proc.py b/waflib/extras/proc.py
index 764abecfc3..121b56a83f 100644
--- a/waflib/extras/proc.py
+++ b/waflib/extras/proc.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # per rosengren 2011
 
 from os import environ, path
diff --git a/waflib/extras/protoc.py b/waflib/extras/protoc.py
index f3cb4d86ab..bed1f504eb 100644
--- a/waflib/extras/protoc.py
+++ b/waflib/extras/protoc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Philipp Bender, 2012
 # Matt Clarkson, 2012
diff --git a/waflib/extras/pyqt5.py b/waflib/extras/pyqt5.py
index c21dfa7204..085ef7328c 100644
--- a/waflib/extras/pyqt5.py
+++ b/waflib/extras/pyqt5.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Federico Pellegrin, 2016-2018 (fedepell) adapted for Python
 
diff --git a/waflib/extras/pytest.py b/waflib/extras/pytest.py
index 7dd5a1a087..4513e1144e 100644
--- a/waflib/extras/pytest.py
+++ b/waflib/extras/pytest.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Calle Rosenquist, 2016-2018 (xbreak)
 
diff --git a/waflib/extras/qnxnto.py b/waflib/extras/qnxnto.py
index 1158124da9..3caa995424 100644
--- a/waflib/extras/qnxnto.py
+++ b/waflib/extras/qnxnto.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero 2011 (zougloub)
 # QNX neutrino compatibility functions
diff --git a/waflib/extras/qt4.py b/waflib/extras/qt4.py
index 90cae7e0ae..85681fbb56 100644
--- a/waflib/extras/qt4.py
+++ b/waflib/extras/qt4.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2006-2010 (ita)
 
diff --git a/waflib/extras/relocation.py b/waflib/extras/relocation.py
index 7e821f4166..bdcbb140e5 100644
--- a/waflib/extras/relocation.py
+++ b/waflib/extras/relocation.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/remote.py b/waflib/extras/remote.py
index 3b038f772b..5a351b2868 100644
--- a/waflib/extras/remote.py
+++ b/waflib/extras/remote.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Remote Builds tool using rsync+ssh
 
diff --git a/waflib/extras/resx.py b/waflib/extras/resx.py
index caf4d318bb..a449242759 100644
--- a/waflib/extras/resx.py
+++ b/waflib/extras/resx.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 import os
diff --git a/waflib/extras/review.py b/waflib/extras/review.py
index 561e06219d..725f0ebdcc 100644
--- a/waflib/extras/review.py
+++ b/waflib/extras/review.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Laurent Birtz, 2011
 # moved the code into a separate tool (ita)
diff --git a/waflib/extras/rst.py b/waflib/extras/rst.py
index f3c3a5eba4..0c71404bf4 100644
--- a/waflib/extras/rst.py
+++ b/waflib/extras/rst.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Jérôme Carretero, 2013 (zougloub)
 
diff --git a/waflib/extras/run_do_script.py b/waflib/extras/run_do_script.py
index f3c58122c9..5efc4bbcef 100644
--- a/waflib/extras/run_do_script.py
+++ b/waflib/extras/run_do_script.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Hans-Martin von Gaudecker, 2012
 
diff --git a/waflib/extras/run_m_script.py b/waflib/extras/run_m_script.py
index b5f27ebe08..0e06c6972a 100644
--- a/waflib/extras/run_m_script.py
+++ b/waflib/extras/run_m_script.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Hans-Martin von Gaudecker, 2012
 
diff --git a/waflib/extras/run_py_script.py b/waflib/extras/run_py_script.py
index 367038114c..988cf638fc 100644
--- a/waflib/extras/run_py_script.py
+++ b/waflib/extras/run_py_script.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Hans-Martin von Gaudecker, 2012
 
diff --git a/waflib/extras/run_r_script.py b/waflib/extras/run_r_script.py
index b0d8f2b2cd..f15b84dcec 100644
--- a/waflib/extras/run_r_script.py
+++ b/waflib/extras/run_r_script.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Hans-Martin von Gaudecker, 2012
 
diff --git a/waflib/extras/sas.py b/waflib/extras/sas.py
index 754c6148de..6f9de982a7 100644
--- a/waflib/extras/sas.py
+++ b/waflib/extras/sas.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Mark Coggeshall, 2010
 
diff --git a/waflib/extras/scala.py b/waflib/extras/scala.py
index a9880f0234..e772ee1324 100644
--- a/waflib/extras/scala.py
+++ b/waflib/extras/scala.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/waflib/extras/slow_qt4.py b/waflib/extras/slow_qt4.py
index ec7880bf9d..921c5ee217 100644
--- a/waflib/extras/slow_qt4.py
+++ b/waflib/extras/slow_qt4.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # Thomas Nagy, 2011 (ita)
 
 """
diff --git a/waflib/extras/softlink_libs.py b/waflib/extras/softlink_libs.py
index 50c777f28c..f01635f710 100644
--- a/waflib/extras/softlink_libs.py
+++ b/waflib/extras/softlink_libs.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # per rosengren 2011
 
 from waflib.TaskGen import feature, after_method
diff --git a/waflib/extras/stale.py b/waflib/extras/stale.py
index cac3f469c9..7523046e4a 100644
--- a/waflib/extras/stale.py
+++ b/waflib/extras/stale.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: UTF-8
 # Thomas Nagy, 2006-2015 (ita)
 
diff --git a/waflib/extras/stracedeps.py b/waflib/extras/stracedeps.py
index 37d82cbb72..c15de76e14 100644
--- a/waflib/extras/stracedeps.py
+++ b/waflib/extras/stracedeps.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2015 (ita)
 
diff --git a/waflib/extras/swig.py b/waflib/extras/swig.py
index fd3d6d2c99..a52f1570d5 100644
--- a/waflib/extras/swig.py
+++ b/waflib/extras/swig.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: UTF-8
 # Petar Forai
 # Thomas Nagy 2008-2010 (ita)
diff --git a/waflib/extras/syms.py b/waflib/extras/syms.py
index dfa005930e..6a4b80ee1a 100644
--- a/waflib/extras/syms.py
+++ b/waflib/extras/syms.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/ticgt.py b/waflib/extras/ticgt.py
index f43a7ea5cb..83af521cc2 100644
--- a/waflib/extras/ticgt.py
+++ b/waflib/extras/ticgt.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 # Texas Instruments code generator support (experimental)
diff --git a/waflib/extras/unity.py b/waflib/extras/unity.py
index 78128ed385..9e8abd8908 100644
--- a/waflib/extras/unity.py
+++ b/waflib/extras/unity.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/use_config.py b/waflib/extras/use_config.py
index ef5129f219..c4f1927f99 100644
--- a/waflib/extras/use_config.py
+++ b/waflib/extras/use_config.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding=utf-8
 # Mathieu Courtois - EDF R&D, 2013 - http://www.code-aster.org
 
diff --git a/waflib/extras/valadoc.py b/waflib/extras/valadoc.py
index c50f69e747..837457d7fa 100644
--- a/waflib/extras/valadoc.py
+++ b/waflib/extras/valadoc.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: UTF-8
 # Nicolas Joseph 2009
 
diff --git a/waflib/extras/waf_xattr.py b/waflib/extras/waf_xattr.py
index 351dd63a78..9813b179e3 100644
--- a/waflib/extras/waf_xattr.py
+++ b/waflib/extras/waf_xattr.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/why.py b/waflib/extras/why.py
index 1bb941f6c9..b86cb1de61 100644
--- a/waflib/extras/why.py
+++ b/waflib/extras/why.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010 (ita)
 
diff --git a/waflib/extras/win32_opts.py b/waflib/extras/win32_opts.py
index 9f7443c39b..d76182d15b 100644
--- a/waflib/extras/win32_opts.py
+++ b/waflib/extras/win32_opts.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 
 """
diff --git a/waflib/extras/xcode6.py b/waflib/extras/xcode6.py
index c062a74e4f..051ca9b7a3 100644
--- a/waflib/extras/xcode6.py
+++ b/waflib/extras/xcode6.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # XCode 3/XCode 4/XCode 6/Xcode 7 generator for Waf
 # Based on work by Nicolas Mercier 2011
diff --git a/waflib/fixpy2.py b/waflib/fixpy2.py
index 24176e0664..9cf3ac04cd 100644
--- a/waflib/fixpy2.py
+++ b/waflib/fixpy2.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2010-2018 (ita)
 
diff --git a/waflib/processor.py b/waflib/processor.py
index 2eecf3bd93..ce8647b6de 100755
--- a/waflib/processor.py
+++ b/waflib/processor.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2016-2018 (ita)
 
diff --git a/wscript b/wscript
index e3567ef179..00dff825da 100644
--- a/wscript
+++ b/wscript
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 # Thomas Nagy, 2005-2018