diff -Naur dkms.old/dkms dkms/dkms
--- dkms.old/dkms	2013-07-22 13:00:36.395130459 +0200
+++ dkms/dkms	2013-07-22 15:47:42.895163643 +0200
@@ -2524,9 +2524,9 @@
 	die 6 $"Failed to make tarball."
     fi
     case $tarball_ext in
-	gz) gzip -9 "$tarball_dest/$tarball_name";;
-	bz2) bzip2 -9 "$tarball_dest/$tarball_name";;
-	xz) xz -9 "$tarball_dest/$tarball_name";;
+	gz) gzip --force -9 "$tarball_dest/$tarball_name";;
+	bz2) bzip2 --force -9 "$tarball_dest/$tarball_name";;
+	xz) xz --force -9 "$tarball_dest/$tarball_name";;
     esac
     echo $""
     echo $"DKMS: mktarball completed."