anchor.diff:  { lib
   , python3Packages
  -, fetchpatch
   , stdenv
   , writeTextDir
   , substituteAll
  
positive.code:     (substituteAll {
        src = ./fix-rpath.patch;
        inherit (builtins) storeDir;
      })
  
      # Fix detecting incorrect compiler in the store path hash.
      # https://github.com/NixOS/nixpkgs/issues/73417#issuecomment-554077964
      # https://github.com/mesonbuild/meson/pull/6185
      (fetchpatch {
        url = "https://github.com/mesonbuild/meson/commit/972ede1d14fdf17fe5bb8fb99be220f9395c2392.patch";
        sha256 = "19bfsylhpy0b2xv3ks8ac9x3q6vvvyj1wjcy971v9d5f1455xhbb";
      })
    ];
  
  
negative.code: in
  python3Packages.buildPythonApplication rec {
    pname = "meson";
    version = "0.53.2";
  
    src = python3Packages.fetchPypi {
      inherit pname version;
      sha256 = "Po+DDzMYQ5fC6wtlHsUCrbY97LKJeL3ISzVY1xKEwh8=";
    };
  
    postFixup = ''
  