Hi all, On a RHEL system, as I upgrade hacking package from 0.8.0 to 0.9.5, I see flake8 stops working. Upgrading setuptools resolves the issue. But I do not see a change in version for pep8 or setuptools, with the upgrade in setuptools. Any issue in packaging? Any explanation of this behavior? Snippet - [suro at poweredsoured ~]$ pip list | grep hacking hacking (0.8.0) [suro at poweredsoured ~]$ [suro at poweredsoured app]$ sudo pip install hacking==0.9.5 ... <Successful installation> [suro at poweredsoured app]$ flake8 neutron/ ... File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 546, in resolve raise DistributionNotFound(req) pkg_resources.DistributionNotFound: pep8>=1.4.6 [suro at poweredsoured app]$ pip list | grep pep8 pep8 (1.5.6) [suro at poweredsoured app]$ pip list | grep setuptools setuptools (0.6c11) [suro at poweredsoured app]$ sudo pip install -U setuptools ... Successfully installed setuptools Cleaning up... [suro at poweredsoured app]$ pip list | grep pep8 pep8 (1.5.6) [suro at poweredsoured app]$ pip list | grep setuptools setuptools (0.6c11) [suro at poweredsoured app]$ flake8 neutron/ [suro at poweredsoured app]$ -- Regards, Surojit Pathak