{
  channelsNixosStable = {
    ref = "nixos-19.03";
    rev = "915ce0f1e1a75adec7079ddb6cd3ffba5036b3fc";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "190727db4ea7e0d083e7dbcb66ced11f31b340f0";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "ebf4a5a600512aeca322f7c62137483b9ecf116d";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "master";
    rev = "f99d4ba7c4d02a2b46c45ec3ee1f0d3112a51dd8";
  };
}