{
  channelsNixosStable = {
    ref = "nixos-19.09";
    rev = "ce9f1aaa39ee2a5b76a9c9580c859a74de65ead5";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "42f0be81ae05a8fe6d6e8e7f1c28652e7746e046";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "96c1a2b15e719664936d352d0e38ac67a30332c0";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "release-19.09";
    rev = "0d1ca254d0f213a118459c5be8ae465018132f74";
  };
}