diff -r be39042dca40 -r c2db6e29750c layers.sysdef.xml
--- a/layers.sysdef.xml	Sat Feb 20 00:38:00 2010 +0200
+++ b/layers.sysdef.xml	Fri Mar 12 15:51:10 2010 +0200
@@ -9,6 +9,10 @@
       <module name="usb">
         <unit unitID="lcdo.usb" mrp="" bldFile="&layer_real_source_path;/group" name="usb" />
       </module>
+      <module name="">
+        <unit unitID="lcdo.usb.usbextension" mrp="" bldFile="&layer_real_source_path;/usbextension/group" filter="!sf_build" name="usb_usbextension" />
+        <unit unitID="lcdo.usb.usb_plat.usb_audio_stream_plugin_api" mrp="" bldFile="&layer_real_source_path;/usb_plat/usb_audio_stream_plugin_api/group" filter="!sf_build" name="usb_usb_plat_usb_audio_stream_plugin_api" />
+      </module>    
     </layer>
   </systemModel>
 </SystemDefinition>