anchor.diff: -{ stdenv, fetchurl, pkgconfig, intltool, libxfce4util, xfce4-panel, libxfce4ui, xfconf, gtk2, xfce }:
  +{ stdenv, fetchurl, pkgconfig, intltool, libxfce4util, xfce4-panel, libxfce4ui, gtk3, xfce }:
   
   let
     category = "panel-plugins";
  
positive.code: 
  stdenv.mkDerivation rec {
    pname  = "xfce4-genmon-plugin";
    version = "3.4.0";
  
    src = fetchurl {
      url = "mirror://xfce/src/${category}/${pname}/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.bz2";
      sha256 = "11q3g6lmgz3d5lyh6614mxkd9cblfdyf9jgki7f26mn895xk79dh";
    };
  
    nativeBuildInputs = [ pkgconfig ];
    buildInputs = [ intltool libxfce4util libxfce4ui xfce4-panel xfconf gtk2 ];
    
    passthru.updateScript = xfce.updateScript {
      inherit pname version;
  
negative.code:   };
  
    meta = with stdenv.lib; {
      homepage = "https://docs.xfce.org/panel-plugins/xfce4-genmon-plugin";
      description = "Generic monitor plugin for the Xfce panel";
      license = licenses.gpl2Plus;
      platforms = platforms.linux;
      maintainers = [ maintainers.AndersonTorres ];
    };
  }
  