{
  channelsNixosStable = {
    ref = "nixos-19.09";
    rev = "c5aabb0d603e2c1ea05f5a93b3be82437f5ebf31";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "7827d3f4497ed722fedca57fd4d5ca1a65c38256";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "abe853b84c58ddbb7c5c07e80090d47480d56c11";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "master";
    rev = "450571056552c9311fcb2894328696b535265593";
  };
}