anchor.diff:          gstPluginsGood;
         inherit (p.xlibs) libXt renderproto libXrender;
       });
  -
  +    
     wvstreams = callPackage ../development/libraries/wvstreams { };
   
     wxGTK = wxGTK28;
  
positive.code: 
  
    # Return the complete set of packages, after applying the overrides
    # returned by the `overrider' function (see above).
    applyGlobalOverrides = overrider:
      let
        # Call the overrider function.  We don't want stdenv overrides
  
negative.code:   kde4 = kde45;
  
    kde45 = callPackage ../desktops/kde-4.5 {
      callPackage = newScope pkgs.kde45;
    };
      
    kde46 = callPackage ../desktops/kde-4.6 {
      callPackage = newScope pkgs.kde46;
    };
  
    redshift = callPackage ../applications/misc/redshift {
  