It is not enough to remove /usr/lib/python-wheels in python3.4 and use a tmpdir because pip (inside the venv) also needs to have the *.whl files on its sys.path, otherwise its imports fail. pip would have to put all /usr/share/python-wheels/*.whl on its sys.path (which I don't like). Or we would have to also copy all of /usr/share/python-wheels/*.whl to the tempdir. Even then though, I'm not sure that's enough to make pip-inside-venv work again when run outside of ensurepip.
Given where we are in the Jessie cycle, and the fact that this bug is not triggered by a user visible failure, and things work right now, I am disinclined to change this. Perhaps we can look again for Jessie+1. If it ain't broke... -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
