tox won't run due to this little dependency bug: Traceback (most recent call last): File "/usr/bin/tox-2.7", line 5, in <module> from pkg_resources import load_entry_point File "/usr/lib64/python2.7/site-packages/pkg_resources.py", line 2837, in <module> working_set = WorkingSet._build_master() File "/usr/lib64/python2.7/site-packages/pkg_resources.py", line 451, in _build_master return cls._build_from_requirements(__requires__) File "/usr/lib64/python2.7/site-packages/pkg_resources.py", line 464, in _build_from_requirements dists = ws.resolve(reqs, Environment()) File "/usr/lib64/python2.7/site-packages/pkg_resources.py", line 639, in resolve raise DistributionNotFound(req) pkg_resources.DistributionNotFound: py>=1.4.15
This is fixed in newer versions and 1.6.1 is now removed from the tree.