NixOS/nixpkgs — pull request #519 by offlinehacker (2013-05-10 20:51:25+00:00)
Title: Add powerline beta, libgit2 and pygit2

Powerline is the ultimate statusline/prompt utility https://powerline.readthedocs.org/en/latest/introduction.html#screenshots.

It has support for vim, zsh, bash, tmux,.. Still in beta, but most of the things work just fine.