6fa6decded
Starting geant4 10.6.2 g4py can not be built separately http://geant4-data.web.cern.ch/geant4-data/ReleaseNotes/Patch4.10.6-2.txt Also, it appears that g4py itself is now deprecated, it was moved to environments/g4py/tests/g4pytest in the source distribution. The only remaining imported module is Geant4, hence python package name `pythonPackages.geant4`, the capitalization matches the one of the non-python attribute.