{
  channelsNixosStable = {
    ref = "nixos-19.09";
    rev = "2de9367299f325c2b2021a44c2f63c810f8ad023";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "a21c2fa3ea2b88e698db6fc151d9c7259ae14d96";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "310316701f0cb6a4a0191bc90c229cef1861dd06";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "release-19.09";
    rev = "f5c9303cedd67a57121f0cbe69b585fb74ba82d9";
  };
}