Support python setuptools package-data

[rupurt]

I'm building a python project that includes jinja templates and css files. Unfortunately it seems like the dream2nix pip module doesn't support setuptools package-data as those files are not included in the final derivation.

Are there any plans to support this or workarounds to get these non-python files included in the final derivation?

[DavHau]

It should be supported. Could you open an issue with a minimal reproducer flake where it doesn't work?