> despite this not being a job

Yes and no - I'm only employed for 2 days a week, and earn enough in (recurring) donation income for this to be considered a part-time job. I also do some training/consulting around Python/pytest with my company (Bruhin Software), but that's usually only a couple of days per month.

> Using a virtual env. did not solve the issues for me.

That's weird, I'm not aware of any issues like that which wouldn't be resolved by using a virtualenv. You might want to try using qutebrowser's mkvenv.py which takes care of everything (or at least tries to):

https://github.com/qutebrowser/qutebrowser/blob/master/doc/i...