anchor.diff:  , Cocoa
   , IOKit
   , libsamplerate
  +, shaderc
   }:
   let
     assets = fetchsvn {
  
positive.code:     "graphics_engine"
      # Internal library of STK, nothing to do about it
      "graphics_utils"
      # This irrlicht is bundled with cmake
      # whereas upstream irrlicht still uses
      # archaic Makefiles, too complicated to switch to.
  
negative.code: stdenv.mkDerivation rec {
  
    pname = "supertuxkart";
    version = "1.4";
  
    src = fetchFromGitHub {
      owner = "supertuxkart";
      repo = "stk-code";
      rev = version;
      hash = "sha256-gqdaVvgNfCN40ZO/9y8+vTeIJPSq6udKxYZ/MAi4ZMM=";
    };
  
    postPatch = ''
  