{
  channelsNixosStable = {
    ref = "nixos-20.03";
    rev = "dbacfa172f9a6399f180bcd0aef7998fdec0d55a";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "82b54d490663b6d87b7b34b9cfc0985df8b49c7d";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "a1bcb3a83ffdd3b50063a24e6d490c69455268ee";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "release-19.09";
    rev = "0d1ca254d0f213a118459c5be8ae465018132f74";
  };
}