anchor.diff:  
     nativeBuildInputs = [
       intltool
  +    makeWrapper
     ];
   
     buildInputs = [
       adwaita-icon-theme
       avahi
       dbus_glib
  +    dconf
       file
       glib
       gnutls
  
positive.code:     (wtFlag "jpeg" (libjpeg != null) null)
    ];
  
    doCheck = true;
  
    meta = with stdenv.lib; {
  
negative.code: { stdenv
  , fetchurl
  , intltool
  , makeWrapper
  
  , adwaita-icon-theme
  , avahi
  , dbus_glib
  , dconf
  , file
  , glib
  , gnutls
  