anchor.diff:  in
   stdenv.mkDerivation {
     inherit name src version;
  -  nativeBuildInputs = [ gradle_4 perl makeWrapper ];
  +  nativeBuildInputs = [ gradle perl makeWrapper ];
     buildInputs = [ jre ];
   
     patches = [ ./0001-gradle.patch ];
  
positive.code: { stdenv, fetchFromGitHub, jre, git, gradle_4, perl, makeWrapper }:
  
  let
    name = "mxisd-${version}";
  
negative.code:   deps = stdenv.mkDerivation {
      name = "${name}-deps";
      inherit src;
      nativeBuildInputs = [ gradle perl git ];
  
      buildPhase = ''
        export MXISD_BUILD_VERSION=${rev}
  