diff -urNad ispell-fo.orig/ispell-fo-0.4.2/debian/rules ispell-fo/ispell-fo-0.4.2/debian/rules
--- ispell-fo.orig/ispell-fo-0.4.2/debian/rules	2015-02-12 22:05:36.097081275 +0000
+++ ispell-fo/ispell-fo-0.4.2/debian/rules	2015-02-12 22:08:49.101638406 +0000
@@ -23,9 +23,9 @@
 	cat words-fo.ispell | ispell -d ./faroese -e | \
 		tr -s ' ' '\n' | sort | uniq > faroese.words
 # --------- ifaroese ------------------
-	gzip -9 -c words-fo.ispell > faroese.mwl.gz
+	gzip -9n -c words-fo.ispell > faroese.mwl.gz
 # --------- aspell-fo -----------------
-	grep -v -e '--' words-fo.ispell | prezip -s -c | gzip -9 -c > fo.cwl.gz
+	grep -v -e '--' words-fo.ispell | prezip -s -c | gzip -9n -c > fo.cwl.gz
 # --------- myspell-fo-fo -------------
 	ispellaff2myspell --charset=latin1 \
 			  --printcomments \