$NetBSD$

Exclude lib/Makefile, let libtool deal with that

--- Makefile.orig	2025-02-05 10:16:36.598268887 +0000
+++ Makefile
@@ -3,7 +3,7 @@ all: doc src include lib
 clean: cleandoc cleansrc cleaninclude cleanlib
 install: installinclude installlib
 
-doc src include lib:
+doc src include:
 	$(MAKE) -C $@
 
 lib: include