anchor.diff:  
     libXau = super.libXau.overrideAttrs (attrs: {
       outputs = [ "out" "dev" ];
  +    propagatedBuildInputs = [ self.xorgproto ];
     });
   
     libXdmcp = super.libXdmcp.overrideAttrs (attrs: {
  
positive.code:           Xplugin Carbon Cocoa
          ];
          propagatedBuildInputs = commonPropagatedBuildInputs ++ [
            libAppleWM applewmproto
          ];
  
          # XQuartz patchset
  
negative.code:     outputs = [ "out" "dev" "doc" ];
      configureFlags = attrs.configureFlags or []
        ++ malloc0ReturnsNullCrossFlag;
      propagatedBuildInputs = [ self.xorgproto ];
    });
  
    libXres = super.libXres.overrideAttrs (attrs: {
  