[Distutils] PEP for dependencies on libraries like BLAS

[Reinout van Rees]

Donald Stufft schreef op 17-08-15 om 16:15:
> pip already accepts things installs by not pip as long as they have standard Python metadata installed too, which most Linux distributions do. Virtual environments of course isolate you from the system so it isolates you from that too, but that can be disabled by using —system-site-packages.
If I understand correctly, --system-site-packages results in the full 
amount of site-wide installed packages to be available. So pip will look 
at them all.

What I am aiming at (and which syseggrecipe does for buildout) is to 
*selectively* and *explicitly* allow some site-wide packages to be 
available in the virtualenv. "Give me the global numpy and lxml, please!".

Reinout

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