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* Remove the ``[install] prefix = ...`` setting from the virtualenv
``distutils.cfg`` -- this has been causing problems for a lot of
people, in rather obscure ways.
* If you use a boot script it will attempt to import ``virtualenv``
and find a pre-downloaded Setuptools egg using that.
* Added platform-specific paths, like ``/usr/lib/pythonX.Y/plat-linux2``