Setting $PATH per-project for a virtualenv?

Hi,

I'm setting PyCharm to use the /bin/python interpreter for my virtualenv, and that works fine, I get all the right imports.  However, I can't see how to get PyCharm to use the virtualenv's /bin/ directory in general.

For example, I have a pre-commit hook that trys to run pep8, so when I try to commit code from pyflakes that fails because it doesn't have the right $PATH (pep8 is in my virtualenv).

How can I get PyCharm to use a particular $PATH for all commands in a particular project?

Thanks