ensure `pip` does not call out to external servers
ensure `pip` does not call out to external servers

andrespires/python-buildpack,Nazanin84/python-buildpack,gitricko/apt-python-buildpack,jimlindeman/python-buildpack-collectd,jimlindeman/python-buildpack-collectd,pkumar-appd/python-buildpack,cloudfoundry/python-buildpack,gitricko/apt-python-buildpack,pkumar-appd/python-buildpack,cloudfoundry/python-buildpack,jimlindeman/python-buildpack-collectd,cloudfoundry/python-buildpack,pkumar-appd/python-buildpack,Nazanin84/python-buildpack,Nazanin84/python-buildpack,andrespires/python-buildpack,gitricko/apt-python-buildpack,andrespires/python-buildpack