diff -urNad wily.orig/wily-0.13.41/debian/rules wily/wily-0.13.41/debian/rules
--- wily.orig/wily-0.13.41/debian/rules	2015-02-07 17:53:39.882032020 +0000
+++ wily/wily-0.13.41/debian/rules	2015-02-07 18:02:08.272734095 +0000
@@ -3,6 +3,8 @@
 
 #export DH_VERBOSE=1
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 build: build-stamp
 build-stamp:
 	dh_testdir
@@ -37,7 +39,7 @@
 	install -m755 -s tools/win/wgoto debian/wily/usr/bin
 	install -m755 -s tools/win/wreplace debian/wily/usr/bin
 	install -m644 debian/wily.1x debian/wily/usr/share/man/man1
-	gzip -9 debian/wily/usr/share/man/man1/wily.1x
+	gzip -9n debian/wily/usr/share/man/man1/wily.1x
 	install -m644 tools/win/w*.1 debian/wily/usr/share/man/man1
 	install -m644 misc/fixed.9.font debian/wily/usr/X11R6/lib/X11/wily
 	install -m644 misc/prop.9.font debian/wily/usr/X11R6/lib/X11/wily
@@ -51,8 +53,10 @@
 	install -m644 Doc/changes.txt debian/wily/usr/share/doc/wily/html
 	install -m644 Doc/*.html debian/wily/usr/share/doc/wily/html
 	install -m644 Doc/*.gif debian/wily/usr/share/doc/wily/html
-	cd Doc && tar -czhf ../debian/wily/usr/share/doc/wily/tute.tar.gz tute
-	cd misc && tar -czhf ../debian/wily/usr/share/doc/wily/wily.tar.gz wily
+	cd Doc && GZIP="-9n" tar -czhf \
+		../debian/wily/usr/share/doc/wily/tute.tar.gz tute --mtime="$(BUILD_DATE)"
+	cd misc && GZIP="-9n" tar -czhf \
+		../debian/wily/usr/share/doc/wily/wily.tar.gz wily --mtime="$(BUILD_DATE)"
 	touch install-stamp
 
 binary-indep: build install