When trying to install virtualenv using a brewed python, I get the following error:

$ pip install virtualenv
Requirement already satisfied (use --upgrade to upgrade): \
  virtualenv in /Library/Python/2.7/site-packages/virtualenv-1.9.1-py2.7.egg
Cleaning up...

So clearly pip is somehow looking into the system python folder instead of the brewed one in /usr/local. How can I avoid this?

The brew doctor finds no problems, and the path priority is set ok.

I tried to remove the virtualenv package from the system python, so I could install virtualenv with the brewed pip. But then I could not create virtualenvs, as I got this error:

$ virtualenv datatransfer/
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
    working_set.require(__requires__)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: virtualenv==1.9.1

So I have not managed to avoid the system virtualenv.

What I am doing wrong?

python macos virtualenv homebrew
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