anchor.diff:      ] ++ stdenv.lib.optional qtSupport qt4;
   
     pythonPath = with pythonPackages; [
  +      dbus
         pillow
  -      pythonDBus
         pygobject
         recursivePthLoader
         reportlab
  
positive.code: 
    postInstall =
      ''
      wrapPythonPrograms
      ''
      + (stdenv.lib.optionalString withPlugin
      (let hplip_arch =
  
negative.code: { stdenv, fetchurl, automake, pkgconfig
  , cups, zlib, libjpeg, libusb1, pythonPackages, saneBackends, dbus
  , polkit, qtSupport ? true, qt4, pyqt4, net_snmp
  , withPlugin ? false, substituteAll, makeWrapper
  }:
  
  let
  