Previously only direct dependencies were available in the python search
path. Transitive dependencies would not be available and thus a few
features would not work due to import errors. Those import errors were
being caugth and gave a (wrong) hint why it wouldn't work. By using
`python.withPackages` instead of the crafted search path with only the
direct dependencies those missing feature should now be working.
See issue #67094 for details on the observed errors.
Fixes#67094
4fdbdcede0