[issue1298835] Add a vendor-packages directory for system-supplied modules

[Nick Coghlan]

Nick Coghlan added the comment:

The discussion on distutils-sig that Éric is referring to is one were I ended up pointing out that PEP 439 (bootstrapping pip in 3.4) needs to address this in some manner, so that pip (which installs to site-packages) doesn't end up fighting with system package managers that are also installing to site-packages in many cases.

Since the distro vendors are in a better situation to change their target installation directory, the consensus on the list was that something *like* the current Debian solution is most appropriate (I wasn't aware this issue existed at the time).

The current situation is annoying-but-tolerable with pip as a third party solution, but unacceptable once the command is being provided by Python itself. As with virtual environments, something with upstream support may be able to be cleaner than a third party workaround.

Relevant distutils-sig post:http://mail.python.org/pipermail/distutils-sig/2013-May/020673.html (ignore the initial quoted part - I was just flat out wrong earlier in that thread)

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nosy: +richard

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