Index: /trunk/src/VBox/Runtime/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Runtime/Makefile.kmk	(revision 53992)
+++ /trunk/src/VBox/Runtime/Makefile.kmk	(revision 53993)
@@ -58,7 +58,8 @@
 else ifdef VBOX_ONLY_EXTPACKS_USE_IMPLIBS
  #
- # Build docs only - need just regular R3 runtime.
+ # Build extension packs using import libraries as much as possible (VBoxDTrace
+ # needs Ring-0 IPRT, though).
  #
- LIBRARIES += RuntimeBldProg
+ LIBRARIES += RuntimeBldProg RuntimeR0
  LIBRARIES.solaris += RuntimeR0Stub
  LIBRARIES.win += RuntimeR0Stub RuntimeRCStub