anchor.diff:        --prefix PATH : "${glib.dev}/bin" \
         --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
         --suffix XDG_DATA_DIRS : "$out/share:$GSETTINGS_SCHEMAS_PATH" \
  -      --suffix XDG_DATA_DIRS : "${gnome3.gnome-shell}/share" \
  +      --suffix XDG_DATA_DIRS : "${gnome3.gnome-shell}/share"\
         --suffix XDG_CONFIG_DIRS : "${gnome3.gnome-settings-daemon}/etc/xdg"
     '';
   
  -  meta = with stdenv.lib; {
  -    platforms = platforms.linux;
  -    maintainers = gnome3.maintainers;
  +  passthru = {
  +    updateScript = gnome3.updateScript {
  +      packageName = "gnome-session";
  +      attrPath = "gnome3.gnome-session";
  +    };
     };
   
  +  meta = with stdenv.lib; {
  +    description = "GNOME session manager";
  +    homepage = https://wiki.gnome.org/Projects/SessionManagement;
  +    license = licenses.gpl2Plus;
  +    maintainers = gnome3.maintainers;
  +    platforms = platforms.linux;
  +  };
   }
  
positive.code: { fetchurl, stdenv, pkgconfig, gnome3, glib, dbus-glib, json-glib, upower
  , libxslt, intltool, makeWrapper, systemd, xorg, epoxy }:
  
  stdenv.mkDerivation rec {
    name = "gnome-session-${version}";
  
negative.code:     sha256 = "1ldcalj9i7qharvw8k8gf7pkcvwb1qwiag2ckffx9x8ic2d3v00b";
    };
  
    mesonFlags = [ "-Dsystemd=true" ];
  
    nativeBuildInputs = [
      meson ninja pkgconfig gettext makeWrapper
      xmlto libxslt docbook_xsl docbook_xml_dtd_412
      dbus # for DTD
    ];
  
    buildInputs = [
      glib gtk libICE gnome-desktop json-glib xorg.xtrans gnome3.defaultIconTheme
      gnome3.gnome-settings-daemon gsettings-desktop-schemas systemd epoxy
    ];
  
    postPatch = ''
      chmod +x meson_post_install.py # patchShebangs requires executable file
      patchShebangs meson_post_install.py
    '';
  
    # FIXME: glib binaries shouldn't be in .dev!
    preFixup = ''
  