pypa/virtualenv — pull request #300 by xcolour (2012-07-09 14:32:11+00:00)
Title: fix distutils-init to not rely on __init__.py

On Mac OS X Lion, Apple have only distributed the compiled
.pyc and .pyo files.

distutils-init used to directly 'exec' the real distils'
__init__.py file. Instead, we import the real module using
imp and grab the variables we're interested in.