--- bird-1.0.7/tools/mergedirs.orig	2003-08-14 10:13:15.000000000 +0200
+++ bird-1.0.7/tools/mergedirs	2004-03-28 18:20:02.982898144 +0200
@@ -24,7 +24,7 @@
 		$cpp -U unix -D MACROS_ONLY -I $OBJDIR - |
 		sed "/^[ ]*\$/d;/^#/d;s@\\(.*\\)@\\1 $a/\\1@"
 		done |
-	sort +0 -1 -u |
+	sort -k1,2 -u |
 	cut -d ' ' -f 2`
 rm -rf $LIBDIR $CONFDIR
 mkdir -p $LIBDIR $CONFDIR