anchor.diff:      ++ optionals x11Support [ tcl tk libX11 xproto ]
       ++ optionals stdenv.isDarwin [ CF configd ];
   
  +  hasDistutilsCxxPatch = !(stdenv.cc.isGNU or false);
  +
   in stdenv.mkDerivation {
     name = "python3-${version}";
     pythonVersion = majorVersion;
  
positive.code: 
    patches = [
      ./no-ldconfig.patch
    ];
  
    postPatch = ''
  
negative.code:   passthru = let
      pythonPackages = callPackage ../../../../../top-level/python-packages.nix {python=self; overrides=packageOverrides;};
    in rec {
      inherit libPrefix sitePackages x11Support hasDistutilsCxxPatch;
      executable = "${libPrefix}m";
      buildEnv = callPackage ../../wrapper.nix { python = self; inherit (pythonPackages) requiredPythonModules; };
      withPackages = import ../../with-packages.nix { inherit buildEnv pythonPackages;};
  