Comment 11 for bug 531662

> Can you think of real situations in which someone would have zope.interface but not the pkg_resources?

Yep. This came up for real on one of Twisted's buildslaves, which is what prompted me to file the ticket. I don't know the particulars of how it was installed, but I suppose it was either built from source or, perhaps, installed with a .exe installer (I seem to recall older versions of zope.interface were sometimes distributed that way). I can't tell you which version of zope.interface is installed, though. ;)