--- a/toolkit/mozapps/installer/packager.mk
+++ b/toolkit/mozapps/installer/packager.mk
@@ -114,17 +114,17 @@ ifdef MOZ_INCLUDE_SOURCE_INFO
 	@awk '$$2 == "MOZ_SOURCE_URL" {print $$3}' $(DEPTH)/source-repo.h >> $(MOZ_SOURCESTAMP_FILE)
 endif
 
 .PHONY: make-buildinfo-file
 make-buildinfo-file:
 	$(PYTHON) $(MOZILLA_DIR)/toolkit/mozapps/installer/informulate.py \
 		$(MOZ_BUILDINFO_FILE) \
 		BUILDID=$(BUILDID) \
-		$(addprefix MOZ_SOURCE_REPO=,MOZ_SOURCE_REPO=$(shell awk '$$2 == "MOZ_SOURCE_REPO" {print $$3}' $(DEPTH)/source-repo.h)) \
+		$(addprefix MOZ_SOURCE_REPO=,$(shell awk '$$2 == "MOZ_SOURCE_REPO" {print $$3}' $(DEPTH)/source-repo.h)) \
 		MOZ_SOURCE_STAMP=$(shell awk '$$2 == "MOZ_SOURCE_STAMP" {print $$3}' $(DEPTH)/source-repo.h) \
 		MOZ_PKG_PLATFORM=$(MOZ_PKG_PLATFORM)
 	echo "buildID=$(BUILDID)" > $(MOZ_BUILDID_INFO_TXT_FILE)
 
 .PHONY: make-mozinfo-file
 make-mozinfo-file:
 	cp $(DEPTH)/mozinfo.json $(MOZ_MOZINFO_FILE)