diff --git a/xpinstall/packager/Makefile.in b/xpinstall/packager/Makefile.in
index 7ad60ea404f9..891447d7d04a 100644
--- a/xpinstall/packager/Makefile.in
+++ b/xpinstall/packager/Makefile.in
@@ -116,9 +116,9 @@ _APPNAME	= $(MOZ_PKG_APPNAME)Debug.app
 else
 _APPNAME	= $(MOZ_PKG_APPNAME).app
 endif
-PKG_SUFFIX	= .dmg
+PKG_SUFFIX	= .dmg.gz
 _ABS_TOPSRCDIR	= $(shell cd $(topsrcdir) && pwd)
-MAKE_PACKAGE	= $(_ABS_TOPSRCDIR)/build/package/mac_osx/make-diskimage $(PACKAGE) $(MOZ_PKG_APPNAME) $(MOZ_PKG_APPNAME) && gzip -9 $(PACKAGE)
+MAKE_PACKAGE	= $(_ABS_TOPSRCDIR)/build/package/mac_osx/make-diskimage $(PKG_BASENAME).dmg $(MOZ_PKG_APPNAME) $(MOZ_PKG_APPNAME) && gzip -9 $(PKG_BASENAME).dmg
 MAKE_SDK	=
 endif
 ifeq ($(MOZ_PKG_FORMAT),RPM)