correct setuptools_scm support

RonnyPfannschmidt · RonnyPfannschmidt · commit 9d69c1a7da7f · 2022-07-12T16:54:51.000+02:00
modern setuptools_scm drops python 3.6

* use build isolation
* drop setup_requires
diff --git a/setup.cfg b/setup.cfg
@@ -45,7 +45,7 @@ install_requires =
     execnet>=1.1
     pytest>=6.2.0
     pytest-forked
-setup_requires = setuptools_scm>=6.0
+setup_requires = # left empty, enforce using isolated build system
 
 [options.packages.find]
 where = src
diff --git a/tox.ini b/tox.ini
@@ -5,7 +5,7 @@ envlist=
   py38-pytestmain
   py38-psutil
   py38-setproctitle
-
+isolated_build = true
 [testenv]
 extras = testing
 deps =
