anchor.diff:  
     installParallel = false;
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       homepage = http://www.freedesktop.org/wiki/Software/polkit;
       description = "A toolkit for defining and handling the policy that allows unprivileged processes to speak to privileged processes";
       maintainers = with maintainers; [
  
positive.code:     glib
      expat
      pam
      spidermonkey_24
      gobject-introspection
      systemd_lib
    ];
  
negative.code: , fetchzip
  , gtk-doc
  , intltool
  , lib
  , libtool
  , libxslt
  
  , glib
  , expat
  , pam
  , spidermonkey_52
  , gobject-introspection
  , systemd_lib
  }:
  
  let
    date = "2018-04-03";
    rev = "dda431905221a81921492b1d28b96b4bffb57700";
  in
  stdenv.mkDerivation rec {
    name = "polkit-${date}";
  
    src = fetchzip {
      version = 6;
      url = "https://cgit.freedesktop.org/polkit/snapshot/${rev}.tar.xz";
      multihash = "Qma5P1infsj9vQ8rsNFoU66YKwLDxcp8c5DoFrBfYR5q5v";
      sha256 = "20f577d2f9ee618f8f8e3b9035a402bd4cac68026be186f8b7d12d267fcacffa";
    };
  
    nativeBuildInputs = [
  