Sorry, my bad, it worked, somehow. I think it was releated to setuptools-0.6c9. If you still get the above error, or the following one:
raise VersionConflict(dist,req) # XXX add more info
VersionConflict: (setuptools 0.6c9 (.../virtualz3ext/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg), Requirement.parse('setuptools==0.6c11'))
Do:
- easy_install setuptools==0.6c11
- Re-run buildout.