Mail from Claus Klein:

make sure than target dir exist bevor instll to it:

package/avahi/avahi.mk

@@ -151,6 +151,7 @@ $(AVAHI_DIR)/.installed: $(AVAHI_DIR)/.compiled
 $(TARGET_DIR)/usr/sbin/avahi-autoipd: $(AVAHI_DIR)/.installed
 	mkdir -p $(TARGET_DIR)/etc/avahi
 	mkdir -p $(TARGET_DIR)/var/lib
+	mkdir -p $(TARGET_DIR)/usr/share/udhcpc
 	cp -af $(STAGING_DIR)/etc/avahi/avahi-autoipd.action $(TARGET_DIR)/etc/avahi/
 	cp -af $(BASE_DIR)/package/avahi/busybox-udhcpc-default.script $(TARGET_DIR)/usr/share/udhcpc/default.script
 	chmod 0755 $(TARGET_DIR)/usr/share/udhcpc/default.script