diff --git a/b2g/app/Makefile.in b/b2g/app/Makefile.in
index 71596aaa3c6..c0bf9ffd89a 100644
--- a/b2g/app/Makefile.in
+++ b/b2g/app/Makefile.in
@@ -24,11 +24,6 @@ include $(topsrcdir)/config/rules.mk
 
 APP_ICON = b2g
 
-source_repo ?= $(call getSourceRepo,$(srcdir)/..)
-ifneq (,$(filter http%,$(source_repo)))
-  DEFINES += -DMOZ_SOURCE_REPO='$(source_repo)'
-endif
-
 ifeq ($(OS_ARCH),WINNT)
 REDIT_PATH = $(LIBXUL_DIST)/bin
 endif
diff --git a/build/Makefile.in b/build/Makefile.in
index 417d9f1fe8e..40c3514d2d2 100644
--- a/build/Makefile.in
+++ b/build/Makefile.in
@@ -33,10 +33,12 @@ ifdef MOZ_SOURCE_STAMP
 DEFINES += -DMOZ_SOURCE_STAMP='$(MOZ_SOURCE_STAMP)'
 endif
 
+ifdef MOZILLA_OFFICIAL
 source_repo ?= $(call getSourceRepo,$(topsrcdir)/$(MOZ_BUILD_APP)/..)
 ifneq (,$(source_repo))
   DEFINES += -DMOZ_SOURCE_REPO='$(source_repo)'
 endif
+endif
 
 endif
 
diff --git a/toolkit/components/telemetry/Makefile.in b/toolkit/components/telemetry/Makefile.in
index bebc099c6c4..b58fa9a9222 100644
--- a/toolkit/components/telemetry/Makefile.in
+++ b/toolkit/components/telemetry/Makefile.in
@@ -8,10 +8,12 @@ include $(topsrcdir)/config/makefiles/rcs.mk
 
 DEFINES += -DMOZ_APP_VERSION='"$(MOZ_APP_VERSION)"'
 
+ifdef MOZILLA_OFFICIAL
 MOZ_HISTOGRAMS_VERSION ?= $(call getSourceRepo)/rev/$(firstword $(shell hg -R $(topsrcdir) parent --template='{node|short}\n' 2>/dev/null))
 ifdef MOZ_HISTOGRAMS_VERSION
 DEFINES += -DHISTOGRAMS_FILE_VERSION='$(MOZ_HISTOGRAMS_VERSION)'
 endif
+endif
 
 INSTALL_TARGETS += histoenums
 histoenums_FILES := TelemetryHistogramEnums.h
diff --git a/toolkit/content/Makefile.in b/toolkit/content/Makefile.in
index ba43f063831..8779e2b7e41 100644
--- a/toolkit/content/Makefile.in
+++ b/toolkit/content/Makefile.in
@@ -16,12 +16,14 @@ ifdef MOZ_SOURCE_STAMP
 DEFINES += -DSOURCE_CHANGESET='$(MOZ_SOURCE_STAMP)'
 endif
 
+ifdef MOZILLA_OFFICIAL
 source_repo ?= $(call getSourceRepo)
 ifneq (,$(filter http%,$(source_repo)))
   DEFINES += -DSOURCE_REPO='$(source_repo)'
 else ifneq (,$(strip $(source_repo)))
   DEFINES += -DSOURCE_GIT_COMMIT='$(source_repo)'
 endif
+endif
 
 ifndef BUILD_HOSTNAME
   BUILD_HOSTNAME = $(shell hostname -s || hostname)
diff --git a/toolkit/mozapps/installer/package-name.mk b/toolkit/mozapps/installer/package-name.mk
index 4cb98b45575..1040c217ef9 100644
--- a/toolkit/mozapps/installer/package-name.mk
+++ b/toolkit/mozapps/installer/package-name.mk
@@ -145,7 +145,9 @@ MOZ_SOURCE_STAMP = $(firstword $(shell hg -R $(MOZILLA_DIR) parent --template="{
 # bug: 746277 - preserve existing functionality.
 # MOZILLA_DIR="": cd $(SPACE); hg # succeeds if ~/.hg exists
 ###########################################################################
+ifdef MOZILLA_OFFICIAL
 MOZ_SOURCE_REPO = $(call getSourceRepo,$(MOZILLA_DIR)$(NULL) $(NULL))
+endif
 
 MOZ_SOURCESTAMP_FILE = $(DIST)/$(PKG_PATH)/$(MOZ_INFO_BASENAME).txt
 MOZ_BUILDINFO_FILE = $(DIST)/$(PKG_PATH)/$(MOZ_INFO_BASENAME).json
diff --git a/toolkit/mozapps/installer/packager.mk b/toolkit/mozapps/installer/packager.mk
index 8af082a63cd..3bf80e8284b 100644
--- a/toolkit/mozapps/installer/packager.mk
+++ b/toolkit/mozapps/installer/packager.mk
@@ -217,7 +217,7 @@ RPM_CMD = \
   --define 'moz_numeric_app_version $(MOZ_NUMERIC_APP_VERSION)' \
   --define 'moz_rpm_release $(MOZ_RPM_RELEASE)' \
   --define 'buildid $(BUILDID)' \
-  --define 'moz_source_repo $(MOZ_SOURCE_REPO)' \
+  $(if $(MOZ_SOURCE_REPO),--define 'moz_source_repo $(MOZ_SOURCE_REPO)') \
   --define 'moz_source_stamp $(MOZ_SOURCE_STAMP)' \
   --define 'moz_branding_directory $(topsrcdir)/$(MOZ_BRANDING_DIRECTORY)' \
   --define '_topdir $(RPMBUILD_TOPDIR)' \
@@ -757,14 +757,16 @@ GARBAGE += make-package
 make-sourcestamp-file::
 	$(NSINSTALL) -D $(DIST)/$(PKG_PATH)
 	@echo '$(BUILDID)' > $(MOZ_SOURCESTAMP_FILE)
+ifdef MOZ_SOURCE_REPO
 	@echo '$(MOZ_SOURCE_REPO)/rev/$(MOZ_SOURCE_STAMP)' >> $(MOZ_SOURCESTAMP_FILE)
+endif
 
 .PHONY: make-buildinfo-file
 make-buildinfo-file:
 	$(PYTHON) $(MOZILLA_DIR)/toolkit/mozapps/installer/informulate.py \
 		$(MOZ_BUILDINFO_FILE) \
 		BUILDID=$(BUILDID) \
-		MOZ_SOURCE_REPO=$(MOZ_SOURCE_REPO) \
+		$(addprefix MOZ_SOURCE_REPO=,MOZ_SOURCE_REPO=$(MOZ_SOURCE_REPO)) \
 		MOZ_SOURCE_STAMP=$(MOZ_SOURCE_STAMP) \
 		MOZ_PKG_PLATFORM=$(MOZ_PKG_PLATFORM)
 
diff --git a/toolkit/xre/Makefile.in b/toolkit/xre/Makefile.in
index 92a9da41f77..b9dfb3a312a 100644
--- a/toolkit/xre/Makefile.in
+++ b/toolkit/xre/Makefile.in
@@ -24,11 +24,13 @@ ifdef MOZ_SOURCE_STAMP
 
   INIARGS = --sourcestamp=$(MOZ_SOURCE_STAMP)
 
-  source_repo := $(call getSourceRepo)
+  ifdef MOZILLA_OFFICIAL
+    source_repo := $(call getSourceRepo)
 
-  # extra sanity check for old versions of hg, no showconfig support
-  ifneq (,$(filter http%,$(source_repo)))
-    INIARGS += --sourcerepo=$(source_repo)
+    # extra sanity check for old versions of hg, no showconfig support
+    ifneq (,$(filter http%,$(source_repo)))
+      INIARGS += --sourcerepo=$(source_repo)
+    endif
   endif
 
 endif # MOZ_SOURCE_STAMP