let
  nixpkgsRev = "75942f96b3f7136cdc9cc7d9704824f17fabec02";
  nixpkgsSha256 = "0ay4v4n856xl79ilym4w6vbp6pxzmn8l31j1ch98wa1lj7l71lgi";
  nixpkgs = fetchTarball {
    url = "https://github.com/nixos/nixpkgs/archive/${nixpkgsRev}.tar.gz";
    sha256 = nixpkgsSha256;
  };
in
import nixpkgs