diff -urNad bbswitch.orig/bbswitch-0.8/debian/rules bbswitch/bbswitch-0.8/debian/rules
--- bbswitch.orig/bbswitch-0.8/debian/rules	2015-02-15 10:35:15.491475845 +0000
+++ bbswitch/bbswitch-0.8/debian/rules	2015-02-15 10:36:49.419590438 +0000
@@ -8,6 +8,8 @@
 version := $(shell dpkg-parsechangelog | grep '^Version:' | cut -d' ' -f2 |\
  rev | cut -d- -f2- | rev | cut -d':' -f2)
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 %:
 	dh $@ --with dkms
 
@@ -33,7 +35,7 @@
 	for file in changelog compat control control.modules.in copyright; do \
 		install -m 644 debian/$$file debian/$(name)-source/usr/src/modules/$(name)/debian/; \
 	done
-	cd debian/$(name)-source/usr/src && tar cfj $(name).tar.bz2 modules && rm -rf modules
+	cd debian/$(name)-source/usr/src && tar cfj $(name).tar.bz2 --mtime="$(BUILD_DATE)" modules && rm -rf modules
 
 override_dh_installchangelogs:
 	dh_installchangelogs NEWS