$NetBSD: patch-ab,v 1.2 2016/04/01 11:41:42 jperkin Exp $

Use pkgsrc layout.

--- doc/Makefile.orig	2014-12-19 10:03:18.000000000 +0000
+++ doc/Makefile
@@ -1,4 +1,4 @@
-mandir=$(prefix)/man
+mandir=$(prefix)/${PKGMANDIR}
 man1dir=$(mandir)/man1
 
 CHAPTERS := $(SITE) blurb intro running input output licence manpage index
@@ -17,7 +17,8 @@ halibut.1: manpage.but
 	$(HALIBUT) --man=halibut.1 manpage.but
 
 install:
-	$(INSTALL) -m 644 halibut.1 $(man1dir)/halibut.1
+	mkdir -p $(DESTDIR)$(man1dir)
+	$(INSTALL) -m 644 halibut.1 $(DESTDIR)$(man1dir)/halibut.1
 
 clean:
 	rm -f *.html *.txt *.hlp *.cnt *.1 *.info* *.ps *.pdf *.hh* *.chm