anchor.diff:    ];
   
     buildInputs = [
  -    gtk3
       libxml2
       libsoup
       upower
       libxfce4ui
  -    libxfce4util
       xfce4-panel
  +    xfconf
       hicolor-icon-theme
     ];
   
  
positive.code: { lib, stdenv, fetchurl, pkg-config, intltool, gtk3, libxml2, libsoup, upower,
    libxfce4ui, libxfce4util, xfce4-panel, hicolor-icon-theme, xfce }:
  
  let
    category = "panel-plugins";
  
negative.code: 
  stdenv.mkDerivation rec {
    pname  = "xfce4-weather-plugin";
    version = "0.11.0";
  
    src = fetchurl {
      url = "mirror://xfce/src/${category}/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.bz2";
      sha256 = "1z2k24d599mxf5gqa35i3xmc3gk2yvqs80hxxpyw06yma6ljw973";
    };
  
    nativeBuildInputs = [
  