diff -urNad dactyl.orig/dactyl-1.1+hg7904/debian/rules dactyl/dactyl-1.1+hg7904/debian/rules
--- dactyl.orig/dactyl-1.1+hg7904/debian/rules	2015-01-30 00:47:09.317058959 +0000
+++ dactyl/dactyl-1.1+hg7904/debian/rules	2015-01-30 01:00:16.603764611 +0000
@@ -3,6 +3,7 @@
 PACKAGES=pentadactyl # teledactyl melodactyl
 VERSION=$(shell dpkg-parsechangelog | \
 	sed -n -e '/^Version:/ { s/^Version:\s*//; s/[^a-z0-9]/_/g; p }')
+BUILD_DATE=$(shell date --date="$(shell dpkg-parsechangelog --show-field Date)" "+%Y/%m/%d %H:%M:%S")
 
 %:
 	dh $@ --with xul-ext
@@ -13,7 +14,7 @@
 	dh binary --with xul-ext
 
 override_dh_auto_build:
-	make DIRS=$(PACKAGES) MANGLE=chrome XPI_FILES='bootstrap.js NEWS' xpi
+	make DIRS=$(PACKAGES) MANGLE=chrome XPI_FILES='bootstrap.js NEWS' BUILD_DATE="$(BUILD_DATE)" xpi
 
 override_dh_auto_install:
 	for PACKAGE in $(PACKAGES); \