--- sys/unix/Makefile.doc.orig	2006-07-29 05:14:04.000000000 +0900
+++ sys/unix/Makefile.doc	2006-07-29 05:24:47.000000000 +0900
@@ -40,8 +40,8 @@
 	latex Guidebook.tex
 
 
-GAME	= nethack
-MANDIR	= /usr/local/man/man6
+GAME	= jnethack
+MANDIR	= $(DESTDIR)__PREFIX__/share/man/man6
 MANEXT	= 6
 
 # manual installation for most BSD-style systems