neovim/neovim — pull request #618 by myint (2014-04-25 13:31:54+00:00)
Title: Remove deprecated "--use-mirrors"

In newer versions of `pip`, it is obsolete. See the following relevant links.

https://pip.readthedocs.org/en/latest/news.html
https://github.com/eddyxu/cpp-coveralls/pull/37