Hexahedral mesh elements for an L Bracket?

Strange, inside my interpreter path this is actually already added.
Is this the path inside the docker?

If I pull the docker like suggested here:

the "echo $PYTHONPATH" gives me

/usr/local/dolfinx-real/lib/python3.8/dist-packages :/opt/project:/opt/.pycharm_helpers/pycharm_matplotlib_backend:/opt/.pycharm_helpers/pycharm_display:/opt/.pycharm_helpers/third_party/thriftpy:/opt/.pycharm_helpers/pydev:C:/Users/reseidel/AppData/Local/JetBrains/PyCharm2021.1/cythonExtensions:/opt/project

but still does not find dolfinx