offlineimap lives in tools/networking/offlineimap and does not use the "python-" name prefix.

afew lives in top-level/python-packages.nix and does use the "python-" name prefix.

I consider both to be applications that I install to use one or more scripts it ships with in contrast to python modules that I install to use in my own python applications.

In other words, I don't care so much whether it is written in python and which version of python it uses and would argument that python applications should be all available as top-level derivations and not use a name prefix, like offlineimap already does.

Thoughts?