Paul Moore

I agree with all of this (although it's not easy to do and I don't have time to offer much help on it) but I think it's also worth looking...

Here you are @chrahunt. [toxbuild.log](https://github.com/pypa/pip/files/3868011/toxbuild.log)

IMO, the only sort of environment that should inherit is a `--use-system-site-packages` one, as that's explicitly not isolated from the system environment. Certainly changing the default behaviour to inherit would...

> "isolation testing" is a reasonable one, but I don't believe it should necessarily trump the one in which a user wants to create a virtual environment on a Python...

> To keep the conversation on track, the 3 proposals that have so far been discussed ... and to provide context, pip's current behaviour * pip only looks at `sys.prefix`...

> I think we might miss a chance to make important improvement for many use cases if we keep treating this as a rare special case. Can you give examples...

> I've just re-read your statement, and now understand that the thing you call "site configuration" is what pip calls "global" configuration I just checked the code here, and the...

It might be worth clarifying in those docs that the site location is `{sys.prefix}/pip.ini`, and applies to all environments, not just virtualenvs. The existing docs have the same problem.

I'm not sure it's stalled, so much as run its course. My position is that this is absolutely a feature request, not a bug. And personally, I don't see a...

@uranusjr I'm suggesting making `--only-binary :all:` the default, which doesn't need to know dependency information...