{
  channelsNixosStable = {
    ref = "nixos-19.09";
    rev = "c0c062da7b3e20ec3b6c9416bc03cb3fc61df4b8";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "c1966522d7d5fa54db068140d212cba18731dd98";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "f0d170bb49a143db4c93acb2e9ed5c74c081d204";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "master";
    rev = "595150be86639cd1e41c9eba1cf02dc503d10c23";
  };
}