We've never heard of a version of zope.interface that *wasn't* compatible, and there is a bug in Ubuntu's packaging of zope.interface which causes it to report its version number as 0.0.0:
https://bugs.launchpad.net/zope.interface/+bug/185418
zooko recently added a runtime check, via setuptools, that specific versions of various
packages were reported as available through setuptools at runtime.
however exe and app builds run with collected egg contents, not linked against entire
eggs, i.e. the code is transcluded into a single library.zip
thus setuptools reports that those specific version cannot be reported as available,
though they are in fact available built into the library
this disables that runtime check if the app is running 'frozen'
Using pkg_resources.require() like this also apparently allows people to install multiple different versions of packages on their system and tahoe (if pkg_resources is available to it) will import the version of the package that it requires. I haven't tested this feature.
