$NetBSD$

--- makefile.orig	2019-02-21 16:07:55.000000000 +0000
+++ makefile
@@ -194,9 +194,9 @@ FXT_INSTALL ?= cp -p$(CP_U)v
 
 ## PREFIX is only set if not supplied
 ## for other locations use e.g.  "make install PREFIX=/opt/"
-PREFIX ?= /usr/local/
-LIBDIR=$(PREFIX)/lib
-INCDIR=$(PREFIX)/include/fxt
+PREFIX ?= /usr/pkg/
+LIBDIR=$(DESTDIR)$(PREFIX)/lib
+INCDIR=$(DESTDIR)$(PREFIX)/include/fxt
 .PHONY: install  ## install to $(PREFIX)/lib/ and $(PREFIX)/include/fxt/
 install: lib
 	: '[$@]'
