let
  pkgs = import <nixpkgs> {};
  overlay = pkgs.fetchFromGitHub {
    owner = "mozilla";
    repo = "nixpkgs-mozilla";
    rev = "0510159186dd2ef46e5464484fbdf119393afa58";
    sha256 = "sha256-HJX4Pc5ZUAg4apxB/XHuJ+6ukzvRQqeZMjscOBst2bA=";
  };
in
  import overlay