$NetBSD: patch-Makefile,v 1.1 2023/02/14 21:26:29 schmonz Exp $

Install to DESTDIR.

--- Makefile.orig	2021-01-11 05:25:23.000000000 +0000
+++ Makefile
@@ -1,6 +1,6 @@
-PREFIX ?= /usr/local
-BINDIR := $(PREFIX)/bin
-LIBDIR := $(PREFIX)/lib
+PREFIX ?= @PREFIX@
+BINDIR := $(DESTDIR)$(PREFIX)/bin
+LIBDIR := $(DESTDIR)$(PREFIX)/lib
 
 GETOPTIONSCLI := getoptions-cli --indent=2 --shellcheck
 OPTPARSERDIR := lib/libexec/optparser