[Hamuko]

Isn't that more of a limitation with virtualenv? I've been using virtualfish as my venv manager in the fish shell and it has a `vf upgrade` command for upgrading virtualenvs to newer versions, either by updating in-place or rebuilding the entire virtualenv. So far has worked nicely with my pyenv Python installs.

[rcarmo]

Yeah. I had a shell snippet someplace that was essentially pip freeze | remove virtualenv | make virtualenv | pip install. It's not that hard.