diff -urNad desktop-profiles.orig/desktop-profiles-1.4.20/Makefile desktop-profiles/desktop-profiles-1.4.20/Makefile
--- desktop-profiles.orig/desktop-profiles-1.4.20/Makefile	2015-03-02 22:23:08.587486477 +0000
+++ desktop-profiles/desktop-profiles-1.4.20/Makefile	2015-03-02 22:31:27.329936879 +0000
@@ -3,6 +3,8 @@
 DESTDIR =
 PREFIX = /usr
 
+BUILD_DATE = $(shell dpkg-parsechangelog --show-field Date)
+
 build: documentation l10n check
 
 documentation: dh_installlisting.1
@@ -39,7 +41,11 @@
 	./dh_installlisting
 
 zip-tests:
-	tar -cvzf tests.tgz tests
+	find tests -not -type d -print0 | \
+		LC_ALL="C" sort --zero-terminated | \
+		GZIP="-9n" tar --create --gzip --null --files-from=- \
+			--file=tests.tgz --mtime="$(BUILD_DATE)" \
+			--owner=root --group=root --numeric-owner
 
 check: zip-tests