$ nix-build -A pythonPackages.cairocffi
these derivations will be built:
  /nix/store/2lab4h9srzwp7q4pqfmhcrlvad0lxgvq-python2.7-cairocffi-0.8.0.drv
these paths will be fetched (1.86 MiB download, 10.05 MiB unpacked):
  /nix/store/4dgd2w4hhxybf6swv5lw4372vsmrjl64-python2.7-funcsigs-1.0.2
  /nix/store/8f8s3lp98q88bkzyij78gnhncl7ipn65-python2.7-pytest-3.5.1
  /nix/store/9swcnfnsgj9vcss3hv0f3s9cmkpd34l7-python2.7-bootstrapped-pip-10.0.1
  /nix/store/ajql4527nc96y344p6cmw8djpjbmc9gr-python2.7-cffi-1.11.5-dev
  /nix/store/frdgmz5x885zaf3xzngg4wjyx5xad3vi-python2.7-py-1.5.3
  /nix/store/hsrfnwk4yqwf8apk1df2xpqa4m621zw7-python2.7-pluggy-0.6.0
  /nix/store/i72n0wbwlr13ia7shwmjaww711idxngs-python2.7-cffi-1.11.5
  /nix/store/j2r4x1wb996y1n0w8zlbh5ijwd2hgwvm-python2.7-more-itertools-4.0.1
  /nix/store/kvjp9gmam9809nw9kpfxwimd0hb5i0rv-hook
  /nix/store/q2h1jj16zbhj7k0q35k2xb8waa3fm2c6-python2.7-pycparser-2.18
  /nix/store/yd13l944d3n2fky56gij18czvgi1sjz6-python2.7-attrs-17.4.0
copying path '/nix/store/kvjp9gmam9809nw9kpfxwimd0hb5i0rv-hook' from 'https://cache.nixos.org'...
copying path '/nix/store/9swcnfnsgj9vcss3hv0f3s9cmkpd34l7-python2.7-bootstrapped-pip-10.0.1' from 'https://cache.nixos.org'...
copying path '/nix/store/i72n0wbwlr13ia7shwmjaww711idxngs-python2.7-cffi-1.11.5' from 'https://cache.nixos.org'...
copying path '/nix/store/yd13l944d3n2fky56gij18czvgi1sjz6-python2.7-attrs-17.4.0' from 'https://cache.nixos.org'...
copying path '/nix/store/4dgd2w4hhxybf6swv5lw4372vsmrjl64-python2.7-funcsigs-1.0.2' from 'https://cache.nixos.org'...
copying path '/nix/store/j2r4x1wb996y1n0w8zlbh5ijwd2hgwvm-python2.7-more-itertools-4.0.1' from 'https://cache.nixos.org'...
copying path '/nix/store/hsrfnwk4yqwf8apk1df2xpqa4m621zw7-python2.7-pluggy-0.6.0' from 'https://cache.nixos.org'...
copying path '/nix/store/frdgmz5x885zaf3xzngg4wjyx5xad3vi-python2.7-py-1.5.3' from 'https://cache.nixos.org'...
copying path '/nix/store/q2h1jj16zbhj7k0q35k2xb8waa3fm2c6-python2.7-pycparser-2.18' from 'https://cache.nixos.org'...
copying path '/nix/store/8f8s3lp98q88bkzyij78gnhncl7ipn65-python2.7-pytest-3.5.1' from 'https://cache.nixos.org'...
copying path '/nix/store/ajql4527nc96y344p6cmw8djpjbmc9gr-python2.7-cffi-1.11.5-dev' from 'https://cache.nixos.org'...
building '/nix/store/2lab4h9srzwp7q4pqfmhcrlvad0lxgvq-python2.7-cairocffi-0.8.0.drv'...
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
unpacking sources
unpacking source archive /nix/store/mvaywmgblqmqkcn2bgpxwnfwqpplm7nl-cairocffi-0.8.0.tar.gz
source root is cairocffi-0.8.0
setting SOURCE_DATE_EPOCH to timestamp 1486127156 of file cairocffi-0.8.0/setup.cfg
patching sources
applying patch /nix/store/kqrp26fbmib0n9azd6b9nff802f996yj-dlopen-paths.patch
patching file cairocffi/__init__.py
Hunk #1 succeeded at 22 (offset -5 lines).
applying patch /nix/store/b1idl7qmj9l9rlhk74xx6a74kis40wpm-fix_test_scaled_font.patch
patching file cairocffi/test_cairo.py
configuring
building
running bdist_wheel
running build
running build_py
file cairocffi/_ffi.py (for module cairocffi._ffi) not found
file cairocffi/_ffi_pixbuf.py (for module cairocffi._ffi_pixbuf) not found
creating build
creating build/lib
creating build/lib/cairocffi
copying cairocffi/__init__.py -> build/lib/cairocffi
copying cairocffi/pixbuf.py -> build/lib/cairocffi
copying cairocffi/test_xcb.py -> build/lib/cairocffi
copying cairocffi/constants.py -> build/lib/cairocffi
copying cairocffi/compat.py -> build/lib/cairocffi
copying cairocffi/fonts.py -> build/lib/cairocffi
copying cairocffi/context.py -> build/lib/cairocffi
copying cairocffi/test_cairo.py -> build/lib/cairocffi
copying cairocffi/surfaces.py -> build/lib/cairocffi
copying cairocffi/matrix.py -> build/lib/cairocffi
copying cairocffi/patterns.py -> build/lib/cairocffi
copying cairocffi/xcb.py -> build/lib/cairocffi
copying cairocffi/ffi_build.py -> build/lib/cairocffi
copying cairocffi/test_pixbuf.py -> build/lib/cairocffi
file cairocffi/_ffi.py (for module cairocffi._ffi) not found
file cairocffi/_ffi_pixbuf.py (for module cairocffi._ffi_pixbuf) not found
generating cffi module 'build/lib/cairocffi/_ffi.py'
generating cffi module 'build/lib/cairocffi/_ffi_pixbuf.py'
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/cairocffi
copying build/lib/cairocffi/pixbuf.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/_ffi_pixbuf.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/test_xcb.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/constants.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/_ffi.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/compat.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/fonts.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/context.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/test_cairo.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/surfaces.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/matrix.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/patterns.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/xcb.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/ffi_build.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/__init__.py -> build/bdist.linux-x86_64/wheel/cairocffi
copying build/lib/cairocffi/test_pixbuf.py -> build/bdist.linux-x86_64/wheel/cairocffi
running install_egg_info
running egg_info
writing requirements to cairocffi.egg-info/requires.txt
writing cairocffi.egg-info/PKG-INFO
writing top-level names to cairocffi.egg-info/top_level.txt
writing dependency_links to cairocffi.egg-info/dependency_links.txt
file cairocffi/_ffi.py (for module cairocffi._ffi) not found
file cairocffi/_ffi_pixbuf.py (for module cairocffi._ffi_pixbuf) not found
reading manifest file 'cairocffi.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'docs/_build'
warning: no previously-included files found matching 'cairocffi/_ffi*.py'
writing manifest file 'cairocffi.egg-info/SOURCES.txt'
Copying cairocffi.egg-info to build/bdist.linux-x86_64/wheel/cairocffi-0.8.0-py2.7.egg-info
running install_scripts
creating build/bdist.linux-x86_64/wheel/cairocffi-0.8.0.dist-info/WHEEL
creating '/build/cairocffi-0.8.0/dist/cairocffi-0.8.0-py2-none-any.whl' and adding '.' to it
adding 'cairocffi/__init__.py'
adding 'cairocffi/_ffi.py'
adding 'cairocffi/_ffi_pixbuf.py'
adding 'cairocffi/compat.py'
adding 'cairocffi/constants.py'
adding 'cairocffi/context.py'
adding 'cairocffi/ffi_build.py'
adding 'cairocffi/fonts.py'
adding 'cairocffi/matrix.py'
adding 'cairocffi/patterns.py'
adding 'cairocffi/pixbuf.py'
adding 'cairocffi/surfaces.py'
adding 'cairocffi/test_cairo.py'
adding 'cairocffi/test_pixbuf.py'
adding 'cairocffi/test_xcb.py'
adding 'cairocffi/xcb.py'
adding 'cairocffi-0.8.0.dist-info/top_level.txt'
adding 'cairocffi-0.8.0.dist-info/WHEEL'
adding 'cairocffi-0.8.0.dist-info/METADATA'
adding 'cairocffi-0.8.0.dist-info/RECORD'
removing build/bdist.linux-x86_64/wheel
glibPreInstallPhase
installing
/build/cairocffi-0.8.0/dist /build/cairocffi-0.8.0
Processing ./cairocffi-0.8.0-py2-none-any.whl
Requirement already satisfied: cffi>=1.1.0 in /nix/store/i72n0wbwlr13ia7shwmjaww711idxngs-python2.7-cffi-1.11.5/lib/python2.7/site-packages (from cairocffi==0.8.0) (1.11.5)
Requirement already satisfied: pycparser in /nix/store/q2h1jj16zbhj7k0q35k2xb8waa3fm2c6-python2.7-pycparser-2.18/lib/python2.7/site-packages (from cffi>=1.1.0->cairocffi==0.8.0) (2.18)
Installing collected packages: cairocffi
Successfully installed cairocffi-0.8.0
/build/cairocffi-0.8.0
glibPreFixupPhase
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/yrlqa9g1d4vb5slqjpmlys6m4x5n7nns-python2.7-cairocffi-0.8.0
strip is /nix/store/92d2ifxcni4n3zx9s8wnkcjlvnx5ajlc-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/yrlqa9g1d4vb5slqjpmlys6m4x5n7nns-python2.7-cairocffi-0.8.0/lib
patching script interpreter paths in /nix/store/yrlqa9g1d4vb5slqjpmlys6m4x5n7nns-python2.7-cairocffi-0.8.0
checking for references to /build in /nix/store/yrlqa9g1d4vb5slqjpmlys6m4x5n7nns-python2.7-cairocffi-0.8.0...
running install tests
============================= test session starts ==============================
platform linux2 -- Python 2.7.15, pytest-3.5.1, py-1.5.3, pluggy-0.6.0
rootdir: /nix/store/yrlqa9g1d4vb5slqjpmlys6m4x5n7nns-python2.7-cairocffi-0.8.0/lib/python2.7/site-packages, inifile:
collected 42 items / 1 skipped

../../nix/store/yrlqa9g1d4vb5slqjpmlys6m4x5n7nns-python2.7-cairocffi-0.8.0/lib/python2.7/site-packages/cairocffi/test_cairo.py . [  2%]
........./nix/store/ahr2gdvhjyxdfnm23cp7s0gq4m83wj6z-stdenv-linux/setup: line 1283:  2896 Segmentation fault      py.test $out/lib/python2.7/site-packages
builder for '/nix/store/2lab4h9srzwp7q4pqfmhcrlvad0lxgvq-python2.7-cairocffi-0.8.0.drv' failed with exit code 139
error: build of '/nix/store/2lab4h9srzwp7q4pqfmhcrlvad0lxgvq-python2.7-cairocffi-0.8.0.drv' failed