Tested locally:
=====================================================
================== Running pep8 =====================
Searching for pep8
Reading http://pypi.python.org/simple/pep8/
Reading http://github.com/cburroughs/pep8.py/tree/master
Reading http://github.com/jcrocholl/pep8
Best match: pep8 0.6.1
Processing pep8-0.6.1-py2.7.egg
pep8 0.6.1 is already the active version in easy-install.pth
Installing pep8 script to
/Users/pnasrat/Development/pip/pip_virtualenv/bin
Using
/Users/pnasrat/Development/pip/pip_virtualenv/lib/python2.7/site-packages/pep8-0.6.1-py2.7.egg
Processing dependencies for pep8
Finished processing dependencies for pep8
==================== Ended pep8 =====================
=====================================================
For certain combinations of config keys, configuration sources with
higher precedance fail to override lower precedance sources. For
example, setting the environment variable PIP_NO_INDEX will not
override a config file which sets 'no-index'.
