anchor.diff:    ] ++ stdenv.lib.optionals qtSupport [
       pyqt4
     ];
  +
  +  makeWrapperArgs = [ ''--prefix PATH : "${nettools}/bin"'' ];
   
     prePatch = ''
       # HPLIP hardcodes absolute paths everywhere. Nuke from orbit.
  
positive.code:     rm $out/etc/udev/rules.d/56-hpmud.rules
    '';
  
    postFixup = ''
      wrapProgram $out/lib/cups/filter/hpps \
        --prefix PATH : "${nettools}/bin"
  
      substituteInPlace $out/etc/hp/hplip.conf --replace /usr $out
    '' + stdenv.lib.optionalString (!withPlugin) ''
      # A udev rule to notify users that they need the binary plugin.
  
negative.code: 
    nativeBuildInputs = [
      pkgconfig
    ];
  
    pythonPath = with pythonPackages; [
      dbus
      pillow
      pygobject2
  