--- a/make-rules/gnome-component.mk	Fri Jul 01 13:26:45 2016 +0000
+++ b/make-rules/gnome-component.mk	Fri Jul 01 13:27:44 2016 +0000
@@ -29,7 +29,9 @@
 #
 COMPONENT_PROJECT_URL ?=	https://www.gnome.org/
 COMPONENT_MAJOR_MINOR ?=	$(basename $(COMPONENT_VERSION))
+ifndef COMPONENT_ARCHIVE_OVERRIDE
 COMPONENT_ARCHIVE      =	$(COMPONENT_SRC).tar.xz
+endif
 COMPONENT_ARCHIVE_URL ?=	https://download.gnome.org/sources/$(COMPONENT_NAME)/$(COMPONENT_MAJOR_MINOR)/$(COMPONENT_ARCHIVE)
 COMPONENT_BUGDB       ?=	gnome/libraries