anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "packagekit";
  -  version = "1.1.12";
  +  version = "1.1.13";
   
     outputs = [ "out" "dev" ];
   
  
positive.code:     "--localstatedir=/var"
      "--sysconfdir=/etc"
      "--with-dbus-sys=${placeholder "out"}/share/dbus-1/system.d"
      "--with-systemdsystemunitdir=${placeholder "out"}/lib/systemd/system/"
    ]
    ++ lib.optional enableNixBackend "--enable-nix"
    ++ lib.optional (!enableBashCompletion) "--disable-bash-completion"
  
negative.code:     owner = "hughsie";
      repo = "PackageKit";
      rev = "PACKAGEKIT_${lib.replaceStrings ["."] ["_"] version}";
      sha256 = "0xmgac27p5z8wr56yw3cqhywnlvaf8kvyv1g0nzxnq167xj5vxam";
    };
  
    buildInputs = [ glib polkit python3 gobject-introspection ]
  