easy_install Buildout plone failed with Zope2 on windows

[Boussard]

In case, I think on windows installation, with buildout 2.9.3 and plone 4.3.14 there is a problem with Zope 2.13.26 package.
After easy install in egg directory the name of egg is zope2-2.13.26-py2.7.egg not Zope2-2.13.26-py2.7.egg as expected. So _get_matching_dist_in_location verification failed because is case sensitive.
I don't know why Zope2 is installed in lower case but this stop buildout process with this:
 assert newdist is not None # newloc above is missing our dist?!

I modify easy_install to compare thing in lower_case and buildout pass.

Regards Youenn.