--- a/toolkit/locales/l10n.mk
+++ b/toolkit/locales/l10n.mk
@@ -212,17 +212,17 @@ langpack-%: AB_CD=$*
 langpack-%: XPI_NAME=locale-$*
 langpack-%: IS_LANGUAGE_REPACK=1
 langpack-%: IS_LANGPACK=1
 langpack-%: libs-%
 	@echo 'Making langpack $(LANGPACK_FILE)'
 	$(NSINSTALL) -D $(DIST)/$(PKG_LANGPACK_PATH)
 	$(call py_action,preprocessor,$(DEFINES) $(ACDEFINES) \
 	  -DTK_DEFINES=$(TK_DEFINES) -DAPP_DEFINES=$(APP_DEFINES) $(MOZILLA_DIR)/toolkit/locales/generic/install.rdf -o $(DIST)/xpi-stage/$(XPI_NAME)/install.rdf)
-	$(call py_action,zip,-C $(DIST)/xpi-stage/locale-$(AB_CD) $(LANGPACK_FILE) install.rdf $(PKG_ZIP_DIRS) chrome.manifest)
+	$(call py_action,zip,-C $(DIST)/xpi-stage/locale-$(AB_CD) -x **/*.js $(LANGPACK_FILE) install.rdf $(PKG_ZIP_DIRS) chrome.manifest)
 
 langpack-webext-%: LANGPACK_FILE=$(ABS_DIST)/$(PKG_LANGPACK_PATH)$(PKG_LANGPACK_BASENAME).xpi
 langpack-webext-%: AB_CD=$*
 langpack-webext-%: XPI_NAME=locale-$*
 langpack-webext-%: libs-%
 	@echo 'Making new-langpack $(LANGPACK_FILE)'
 	$(NSINSTALL) -D $(DIST)/$(PKG_LANGPACK_PATH)
 	$(call py_action,langpack_manifest,--locales $(AB_CD) --min-app-ver $(MOZ_APP_VERSION) --max-app-ver $(MOZ_APP_MAXVERSION) --app-name "$(MOZ_APP_DISPLAYNAME)" --l10n-basedir "$(L10NBASEDIR)" --defines $(NEW_APP_DEFINES) --input $(DIST)/xpi-stage/locale-$(AB_CD))