{
  channelsNixosStable = {
    ref = "nixos-19.09";
    rev = "e6d584f6dd22b587d5cdf5019f5e7dd2be370f61";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "41d921292e922a6cd1aba64259341c244d4c2cc7";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "a6934e36534f8a87a78f877eee65c08fa9867ba5";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "master";
    rev = "286dd9b3088298e5a4625b517f8e72b1c62e4f74";
  };
}