[illustris@desktop:~/src/nixpkgs]$ git checkout f572eb6f8676eff79968f71e93a7b7e6d1271337
HEAD is now at f572eb6f867 python38Packages.ipyvue: 1.6.1 -> 1.7.0
[illustris@desktop:~/src/nixpkgs]$ nix-shell -I nixpkgs=$(pwd) -p sssd

[nix-shell:~/src/nixpkgs]$ exit
exit
[illustris@desktop:~/src/nixpkgs]$ git checkout 3fe9b97ddfd93bef87c8e9384a583897bc3842a4
Previous HEAD position was f572eb6f867 python38Packages.ipyvue: 1.6.1 -> 1.7.0
HEAD is now at 3fe9b97ddfd python38Packages.ldap: 3.3.1 -> 3.4.0
[illustris@desktop:~/src/nixpkgs]$ nix-shell -I nixpkgs=$(pwd) -p sssd
these 2 derivations will be built:
  /nix/store/vihk2p80465f2awvzl2iq887d6fkyczp-python2.7-python-ldap-3.4.0.drv
  /nix/store/cny6va982i6ddq7k1009pg2fl43mwcjh-sssd-2.6.0.drv
building '/nix/store/vihk2p80465f2awvzl2iq887d6fkyczp-python2.7-python-ldap-3.4.0.drv'...
Sourcing python-remove-tests-dir-hook
Sourcing python-catch-conflicts-hook.sh
Sourcing python-remove-bin-bytecode-hook.sh
Sourcing setuptools-build-hook
Using setuptoolsBuildPhase
Using setuptoolsShellHook
Sourcing pip-install-hook
Using pipInstallPhase
Sourcing python-imports-check-hook.sh
Using pythonImportsCheckPhase
Sourcing setuptools-check-hook
Using setuptoolsCheckPhase
Sourcing pytest-check-hook
Using pytestCheckPhase
Removing setuptoolsCheckPhase
unpacking sources
unpacking source archive /nix/store/7mrr4pwj81xyxmq78bic0nq4qnaypk2j-python-ldap-3.4.0.tar.gz
source root is python-ldap-3.4.0
setting SOURCE_DATE_EPOCH to timestamp 1637939386 of file python-ldap-3.4.0/setup.cfg
patching sources
configuring
no configure script, doing nothing
building
Executing setuptoolsBuildPhase
Traceback (most recent call last):
  File "nix_run_setup", line 8, in <module>
    exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))
  File "setup.py", line 12, in <module>
    'The C API from Python 3.6+ is required, found %s' % sys.version_info
RuntimeError: The C API from Python 3.6+ is required, found sys.version_info(major=2, minor=7, micro=18, releaselevel='final', serial=0)
error: builder for '/nix/store/vihk2p80465f2awvzl2iq887d6fkyczp-python2.7-python-ldap-3.4.0.drv' failed with exit code 1;
       last 10 log lines:
       > configuring
       > no configure script, doing nothing
       > building
       > Executing setuptoolsBuildPhase
       > Traceback (most recent call last):
       >   File "nix_run_setup", line 8, in <module>
       >     exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))
       >   File "setup.py", line 12, in <module>
       >     'The C API from Python 3.6+ is required, found %s' % sys.version_info
       > RuntimeError: The C API from Python 3.6+ is required, found sys.version_info(major=2, minor=7, micro=18, releaselevel='final', serial=0)
       For full logs, run 'nix log /nix/store/vihk2p80465f2awvzl2iq887d6fkyczp-python2.7-python-ldap-3.4.0.drv'.
error: 1 dependencies of derivation '/nix/store/cny6va982i6ddq7k1009pg2fl43mwcjh-sssd-2.6.0.drv' failed to build
[illustris@desktop:~/src/nixpkgs]$