{
  channelsNixosStable = {
    ref = "nixos-19.09";
    rev = "b9cb3b2fb2f45ac8f3a8f670c90739eb34207b0e";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "8130f3c1c2bb0e533b5e150c39911d6e61dcecc2";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "a83b52dd254489001ca4723346fa3da35ff08a10";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "release-19.09";
    rev = "f5c9303cedd67a57121f0cbe69b585fb74ba82d9";
  };
}