pikepdf build fails trying to download pytest from pypi

[ivan]

Describe the bug

pikepdf does not build; ocrmypdf is affected. I think this started happening after the staging-next merge.

To Reproduce
Steps to reproduce the behavior:

1. With nixpkgs master, nix-env -iA python3Packages.pikepdf
2. Observe:

Current branch master is up to date.
at@ra:/home/at/code/system/nixpkgs:master# nix-env --builders '' -iA python3Packages.pikepdf
installing 'python3.7-pikepdf-1.1.0'
these derivations will be built:
  /nix/store/s97qkfgkv0n1h7s4fflfy8qawpd9v2i3-python3.7-pikepdf-1.1.0.drv
building '/nix/store/s97qkfgkv0n1h7s4fflfy8qawpd9v2i3-python3.7-pikepdf-1.1.0.drv'...
unpacking sources
unpacking source archive /nix/store/jidp5m4avapjfss6wdymicy368144n08-pikepdf-1.1.0.tar.gz
source root is pikepdf-1.1.0
setting SOURCE_DATE_EPOCH to timestamp 1551571794 of file pikepdf-1.1.0/src/pikepdf.egg-info/top_level.txt
patching sources
configuring
building
running bdist_wheel
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.7
creating build/lib.linux-x86_64-3.7/pikepdf
copying src/pikepdf/__init__.py -> build/lib.linux-x86_64-3.7/pikepdf
copying src/pikepdf/_cpphelpers.py -> build/lib.linux-x86_64-3.7/pikepdf
copying src/pikepdf/_methods.py -> build/lib.linux-x86_64-3.7/pikepdf
copying src/pikepdf/_version.py -> build/lib.linux-x86_64-3.7/pikepdf
copying src/pikepdf/objects.py -> build/lib.linux-x86_64-3.7/pikepdf
creating build/lib.linux-x86_64-3.7/pikepdf/models
copying src/pikepdf/models/__init__.py -> build/lib.linux-x86_64-3.7/pikepdf/models
copying src/pikepdf/models/image.py -> build/lib.linux-x86_64-3.7/pikepdf/models
copying src/pikepdf/models/matrix.py -> build/lib.linux-x86_64-3.7/pikepdf/models
copying src/pikepdf/models/metadata.py -> build/lib.linux-x86_64-3.7/pikepdf/models
running build_ext
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c /build/tmpxe93rgq5.cpp -o build/tmpxe93rgq5.o -std=c++14
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c /build/tmpsgygt9ip.cpp -o build/tmpsgygt9ip.o -fvisibility=hidden
building 'pikepdf._qpdf' extension
creating build/temp.linux-x86_64-3.7
creating build/temp.linux-x86_64-3.7/src
creating build/temp.linux-x86_64-3.7/src/qpdf
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/annotation.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/annotation.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/object.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/object.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/object_convert.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/object_convert.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/object_repr.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/object_repr.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/pikepdf.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/pikepdf.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/qpdf.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/qpdf.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/qpdf_pagelist.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/qpdf_pagelist.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/shims.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/shims.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/lx2b9fr1rj5578zhv1cxal30kwqabl53-python3.7-pybind11-2.2.4/include/python3.7m -I/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/include/python3.7m -c src/qpdf/utils.cpp -o build/temp.linux-x86_64-3.7/src/qpdf/utils.o -DVERSION_INFO="1.1.0" -std=c++14 -fvisibility=hidden
g++ -pthread -shared -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-zlib-1.2.11/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-bzip2-1.0.6.0.1/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-expat-2.2.7/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-xz-5.2.4/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-libffi-3.2.1/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-gdbm-1.18.1/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-sqlite-3.28.0/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-readline-6.3p08/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-ncurses-6.1-20190112/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-openssl-1.1.1c/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-zlib-1.2.11/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-bzip2-1.0.6.0.1/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-expat-2.2.7/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-xz-5.2.4/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-libffi-3.2.1/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-gdbm-1.18.1/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-sqlite-3.28.0/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-readline-6.3p08/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-ncurses-6.1-20190112/lib -L/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-openssl-1.1.1c/lib build/temp.linux-x86_64-3.7/src/qpdf/annotation.o build/temp.linux-x86_64-3.7/src/qpdf/object.o build/temp.linux-x86_64-3.7/src/qpdf/object_convert.o build/temp.linux-x86_64-3.7/src/qpdf/object_repr.o build/temp.linux-x86_64-3.7/src/qpdf/pikepdf.o build/temp.linux-x86_64-3.7/src/qpdf/qpdf.o build/temp.linux-x86_64-3.7/src/qpdf/qpdf_pagelist.o build/temp.linux-x86_64-3.7/src/qpdf/shims.o build/temp.linux-x86_64-3.7/src/qpdf/utils.o -L/nix/store/xw06hkwpxyjxil3d5h374imxp3qhkscq-python3-3.7.4/lib -lqpdf -lpython3.7m -o build/lib.linux-x86_64-3.7/pikepdf/_qpdf.cpython-37m-x86_64-linux-gnu.so
installing to build/bdist.linux-x86_64/wheel
running install
running install_lib
creating build/bdist.linux-x86_64
creating build/bdist.linux-x86_64/wheel
creating build/bdist.linux-x86_64/wheel/pikepdf
copying build/lib.linux-x86_64-3.7/pikepdf/__init__.py -> build/bdist.linux-x86_64/wheel/pikepdf
copying build/lib.linux-x86_64-3.7/pikepdf/_cpphelpers.py -> build/bdist.linux-x86_64/wheel/pikepdf
copying build/lib.linux-x86_64-3.7/pikepdf/_methods.py -> build/bdist.linux-x86_64/wheel/pikepdf
copying build/lib.linux-x86_64-3.7/pikepdf/_version.py -> build/bdist.linux-x86_64/wheel/pikepdf
copying build/lib.linux-x86_64-3.7/pikepdf/objects.py -> build/bdist.linux-x86_64/wheel/pikepdf
creating build/bdist.linux-x86_64/wheel/pikepdf/models
copying build/lib.linux-x86_64-3.7/pikepdf/models/__init__.py -> build/bdist.linux-x86_64/wheel/pikepdf/models
copying build/lib.linux-x86_64-3.7/pikepdf/models/image.py -> build/bdist.linux-x86_64/wheel/pikepdf/models
copying build/lib.linux-x86_64-3.7/pikepdf/models/matrix.py -> build/bdist.linux-x86_64/wheel/pikepdf/models
copying build/lib.linux-x86_64-3.7/pikepdf/models/metadata.py -> build/bdist.linux-x86_64/wheel/pikepdf/models
copying build/lib.linux-x86_64-3.7/pikepdf/_qpdf.cpython-37m-x86_64-linux-gnu.so -> build/bdist.linux-x86_64/wheel/pikepdf
running install_egg_info
running egg_info
writing src/pikepdf.egg-info/PKG-INFO
writing dependency_links to src/pikepdf.egg-info/dependency_links.txt
writing requirements to src/pikepdf.egg-info/requires.txt
writing top-level names to src/pikepdf.egg-info/top_level.txt
reading manifest file 'src/pikepdf.egg-info/SOURCES.txt'
writing manifest file 'src/pikepdf.egg-info/SOURCES.txt'
Copying src/pikepdf.egg-info to build/bdist.linux-x86_64/wheel/pikepdf-1.1.0-py3.7.egg-info
running install_scripts
creating build/bdist.linux-x86_64/wheel/pikepdf-1.1.0.dist-info/WHEEL
creating 'dist/pikepdf-1.1.0-cp37-cp37m-linux_x86_64.whl' and adding 'build/bdist.linux-x86_64/wheel' to it
adding 'pikepdf/__init__.py'
adding 'pikepdf/_cpphelpers.py'
adding 'pikepdf/_methods.py'
adding 'pikepdf/_qpdf.cpython-37m-x86_64-linux-gnu.so'
adding 'pikepdf/_version.py'
adding 'pikepdf/objects.py'
adding 'pikepdf/models/__init__.py'
adding 'pikepdf/models/image.py'
adding 'pikepdf/models/matrix.py'
adding 'pikepdf/models/metadata.py'
adding 'pikepdf-1.1.0.dist-info/METADATA'
adding 'pikepdf-1.1.0.dist-info/WHEEL'
adding 'pikepdf-1.1.0.dist-info/license.wheel.txt'
adding 'pikepdf-1.1.0.dist-info/top_level.txt'
adding 'pikepdf-1.1.0.dist-info/RECORD'
removing build/bdist.linux-x86_64/wheel
installing
~/pikepdf-1.1.0/dist ~/pikepdf-1.1.0
Processing ./pikepdf-1.1.0-cp37-cp37m-linux_x86_64.whl
Requirement already satisfied: lxml>=4.0 in /nix/store/6j7na6r51b7iam6l8j5lsfx3c9kp89c5-python3.7-lxml-4.3.3/lib/python3.7/site-packages (from pikepdf==1.1.0) (4.3.3)
Requirement already satisfied: defusedxml>=0.5.0 in /nix/store/s1kaa0vdbr1rvsyy0jjhs0y03w61an12-python3.7-defusedxml-0.5.0/lib/python3.7/site-packages (from pikepdf==1.1.0) (0.5.0)
Installing collected packages: pikepdf
Successfully installed pikepdf-1.1.0
~/pikepdf-1.1.0
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/gnxdrjy06xaj4bnz7swl2hw180rcfk0m-python3.7-pikepdf-1.1.0
shrinking /nix/store/gnxdrjy06xaj4bnz7swl2hw180rcfk0m-python3.7-pikepdf-1.1.0/lib/python3.7/site-packages/pikepdf/_qpdf.cpython-37m-x86_64-linux-gnu.so
strip is /nix/store/z13djm1k89vc8myzd5qayk8hddk4glk4-binutils-2.31.1/bin/strip
stripping (with command strip and flags -S) in /nix/store/gnxdrjy06xaj4bnz7swl2hw180rcfk0m-python3.7-pikepdf-1.1.0/lib
patching script interpreter paths in /nix/store/gnxdrjy06xaj4bnz7swl2hw180rcfk0m-python3.7-pikepdf-1.1.0
checking for references to /build/ in /nix/store/gnxdrjy06xaj4bnz7swl2hw180rcfk0m-python3.7-pikepdf-1.1.0...
running install tests
running pytest
Searching for pytest<5,>=4.2.1
Reading https://pypi.org/simple/pytest/
Download error on https://pypi.org/simple/pytest/: [Errno -2] Name or service not known -- Some packages may not be found!
Couldn't retrieve index page for 'pytest'
Scanning index of all packages (this may take a while)
Reading https://pypi.org/simple/
Download error on https://pypi.org/simple/: [Errno -2] Name or service not known -- Some packages may not be found!
No local packages or working download links found for pytest<5,>=4.2.1
error: Could not find suitable distribution for Requirement.parse('pytest<5,>=4.2.1')
builder for '/nix/store/s97qkfgkv0n1h7s4fflfy8qawpd9v2i3-python3.7-pikepdf-1.1.0.drv' failed with exit code 1
error: build of '/nix/store/s97qkfgkv0n1h7s4fflfy8qawpd9v2i3-python3.7-pikepdf-1.1.0.drv' failed

Metadata

• system: "x86_64-linux"
• host os: Linux 4.19.69-hardened, NixOS, 19.09.git.91f6b94 (Loris)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.2.2

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:

cc @Kiwi @FRidh

[ivan]

I'm working on bumping a lot of things to see if this can be made to work with pytest 5