diff --git a/webapprt/Makefile.in b/webapprt/Makefile.in
index 64722b94b2f1..0d06148a3f7f 100644
--- a/webapprt/Makefile.in
+++ b/webapprt/Makefile.in
@@ -2,10 +2,14 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 
-# Include rules.mk explicitly so we can use FINAL_TARGET. Also, the dependencies
-# for webapprt.ini need to be set after PP_TARGETS are expanded in rules.mk.
+# Include config.mk explicitly so we can override FINAL_TARGET.
+include $(topsrcdir)/config/config.mk
+
 include $(topsrcdir)/config/rules.mk
 
+libs:: $(call mkdir_deps,$(FINAL_TARGET))
+	$(call py_action,buildlist,$(FINAL_TARGET)/chrome.manifest 'resource webapprt ./')
+
 MOZ_APP_BUILDID := $(shell cat $(DEPTH)/config/buildid)
 DEFINES += -DMOZ_APP_BUILDID=$(MOZ_APP_BUILDID)
 
diff --git a/webapprt/jar.mn b/webapprt/jar.mn
index 4bd129783c7f..fdf7fef06801 100644
--- a/webapprt/jar.mn
+++ b/webapprt/jar.mn
@@ -15,7 +15,3 @@ webapprt.jar:
   content/downloads/downloads.js        (content/downloads/downloads.js)
   content/downloads/downloads.css       (content/downloads/downloads.css)
   content/downloads/download.xml        (content/downloads/download.xml)
-
-# Trick to put the resource line in dist/bin/webapprt/chrome.manifest
-[.] chrome.jar:
-% resource webapprt ./