anchor.diff:  , makeWrapper
   
   , adwaita-icon-theme
  +, dbus-glib
  +, dconf
  +, gconf
   , gdk-pixbuf
   , glib
   , gnome-desktop
  
positive.code:     "--disable-iso-c"
      "--enable-deprecation-flags"
      "--enable-session-selector"
      "--disable-gconf"
      (enFlag "systemd" (systemd_lib != null) null)
      "--disable-consolekit"
      "--disable-docbook-docs"
  
negative.code: 
    preFixup = ''
      wrapProgram $out/libexec/gnome-session-binary \
        --set 'GSETTINGS_BACKEND' 'dconf' \
        --prefix 'GIO_EXTRA_MODULES' : "$GIO_EXTRA_MODULES" \
        --prefix 'GI_TYPELIB_PATH' : "$GI_TYPELIB_PATH" \
        --prefix 'XDG_DATA_DIRS' : "$GSETTINGS_SCHEMAS_PATH" \
        --prefix 'XDG_DATA_DIRS' : "$out/share" \
  