--- sys/unix/Makefile.doc.orig	2014-09-01 16:25:39.000000000 +0900
+++ sys/unix/Makefile.doc	2014-09-01 16:26:31.000000000 +0900
@@ -40,16 +40,16 @@
 	latex Guidebook.tex
 
 
-GAME	= nethack
-MANDIR	= /usr/local/man/man6
+GAME	= %%HACKNAME%%
+MANDIR	= ${PREFIX}/man/man
 MANEXT	= 6
 
 # manual installation for most BSD-style systems
-GAMEMANCREATE = cp nethack.6
-LEVMANCREATE = cp lev_comp.6
-DGNMANCREATE = cp dgn_comp.6
-RCVRMANCREATE = cp recover.6
-DLBMANCREATE = cp dlb.6
+GAMEMANCREATE = ${BSD_INSTALL_MAN} nethack.6
+LEVMANCREATE = ${BSD_INSTALL_MAN} lev_comp.6
+DGNMANCREATE = ${BSD_INSTALL_MAN} dgn_comp.6
+RCVRMANCREATE = ${BSD_INSTALL_MAN} recover.6
+DLBMANCREATE = ${BSD_INSTALL_MAN} dlb.6
 # manual installation for most SYSV-style systems
 # GAMEMANCREATE = nroff -man nethack.6 >
 # LEVMANCREATE = nroff -man lev_comp.6 >
@@ -58,11 +58,11 @@
 # DLBMANCREATE = nroff -man dlb.6 >
 
 manpages:
-	-$(GAMEMANCREATE) $(MANDIR)/$(GAME).$(MANEXT)
-	-$(LEVMANCREATE) $(MANDIR)/lev_comp.$(MANEXT)
-	-$(DGNMANCREATE) $(MANDIR)/dgn_comp.$(MANEXT)
-	-$(RCVRMANCREATE) $(MANDIR)/recover.$(MANEXT)
-	-$(DLBMANCREATE) $(MANDIR)/dlb.$(MANEXT)
+	-$(GAMEMANCREATE) ${DESTDIR}$(MANDIR)$(MANEXT)/$(GAME).$(MANEXT)
+	-$(LEVMANCREATE) ${DESTDIR}$(MANDIR)$(MANEXT)/lev_comp.$(MANEXT)
+	-$(DGNMANCREATE) ${DESTDIR}$(MANDIR)$(MANEXT)/dgn_comp.$(MANEXT)
+	-$(RCVRMANCREATE) ${DESTDIR}$(MANDIR)$(MANEXT)/recover.$(MANEXT)
+	-$(DLBMANCREATE) ${DESTDIR}$(MANDIR)$(MANEXT)/dlb.$(MANEXT)
 
 # manual creation for distribution
 DISTRIB = Guidebook.txt nethack.txt lev_comp.txt dgn_comp.txt recover.txt dlb.txt