See the python bug report. zope-interface jinja2 and lxml can't be built on 2.6.3. Also see this slow motion accident: http://www.reddit.com/r/Python/comments/9thzf/sudden_burst_of_activity_from_pje/ Reproducible: Always Steps to Reproduce: 1.unmask dev-lang/python 2.emerge =dev-lang/python-2.6.3 3.emerge zope-interface Actual Results: KeyError: '_zope_interface_coptimizations' Expected Results: Successful build and install
*** This bug has been marked as a duplicate of bug 289067 ***