Index: /trunk/Config.kmk
===================================================================
--- /trunk/Config.kmk	(revision 72068)
+++ /trunk/Config.kmk	(revision 72069)
@@ -213,9 +213,13 @@
 # comparison.
 VBOX_VERSION_STRING_RAW = $(VBOX_VERSION_MAJOR).$(VBOX_VERSION_MINOR).$(VBOX_VERSION_BUILD)
+
+# VBOX_VERSION_STRING without the publisher.
+VBOX_VERSION_STRING_NO_PUB = $(VBOX_VERSION_STRING_RAW)$(addprefix _,$(VBOX_VERSION_PRERELEASE))
+
 # Full version string (may include more than just x.y.z, but no spaces or other problematic chars).
 # Note! The BETA[n],ALPHA[n],RC[n] indicators should be inserted before the
 #       publisher so that RTStrVersionCompare have a chance of comparing
 #       prerelease from different publishers correctly.
-VBOX_VERSION_STRING = $(VBOX_VERSION_STRING_RAW)$(addprefix _,$(VBOX_VERSION_PRERELEASE))$(VBOX_BUILD_PUBLISHER)
+VBOX_VERSION_STRING = $(VBOX_VERSION_STRING_NO_PUB)$(VBOX_BUILD_PUBLISHER)
 
 
Index: /trunk/Makefile.kmk
===================================================================
--- /trunk/Makefile.kmk	(revision 72068)
+++ /trunk/Makefile.kmk	(revision 72069)
@@ -426,5 +426,6 @@
 		$(VBOX_SVN_REV_KMK) $(PATH_DEVTOOLS)/bin/extpacks.sh | $$(dir $$@)
 	$(RM) -f -- "$@.tmp" "$@"
-	$(SHELL) $(PATH_DEVTOOLS)/bin/extpacks.sh --cmd fetch --filename "$@.tmp" --vbox-version "$(VBOX_VERSION_STRING)" $(if $(VBOX_USE_PROXY_FOR_BUILD_SERVER),--default-proxy,)
+	$(SHELL) $(PATH_DEVTOOLS)/bin/extpacks.sh --cmd fetch --filename "$@.tmp" --vbox-version "$(VBOX_VERSION_STRING_NO_PUB)" \
+		$(if $(VBOX_USE_PROXY_FOR_BUILD_SERVER),--default-proxy,)
 	$(MV) -f -- "$@.tmp" "$@"
 	$(TOUCH) -- "$@"