anchor.diff:  , libSM ? null
   , x11Support ? (stdenv.isLinux || stdenv.isDarwin)
   , dbus
  +, docbook_xml_dtd_44
  +, docbook-xsl-nons
  +, xmlto
   }:
   
   assert
  
positive.code: 
    configureFlags = [
      "--enable-user-session"
      "--libexecdir=${placeholder ''out''}/libexec"
      "--datadir=/etc"
      "--localstatedir=/var"
  
negative.code:       --replace 'DBUS_DAEMONDIR"/dbus-daemon"' '"/run/current-system/sw/bin/dbus-daemon"'
    '';
  
    outputs = [ "out" "dev" "lib" "doc" "man" ];
  
    nativeBuildInputs = [
      pkgconfig
      docbook_xml_dtd_44
      docbook-xsl-nons
      xmlto
    ];
  
    propagatedBuildInputs = [
  