$NetBSD: patch-Unix_Makefile,v 1.2 2017/07/05 19:22:04 wiedi Exp $

Don't hardcode env
--- Unix/Makefile.orig	2017-01-14 23:25:40.000000000 +0000
+++ Unix/Makefile
@@ -26,10 +26,10 @@ endif
 PACKAGE		= cloc
 
 DESTDIR		=
-prefix		= /usr
+prefix		= $(PREFIX)
 exec_prefix	= $(prefix)
 man_prefix	= $(prefix)/share
-mandir		= $(man_prefix)/man
+mandir		= $(prefix)/$(PKGMANDIR)
 bindir		= $(exec_prefix)/bin
 sharedir	= $(prefix)/share
 
@@ -54,7 +54,7 @@ PL_SCRIPT	= $(BIN)
 INSTALL_OBJS_BIN = $(PL_SCRIPT)
 INSTALL_OBJS_MAN = *.1
 
-INSTALL		= /usr/bin/install
+INSTALL		= install
 INSTALL_BIN	= $(INSTALL) -m 755
 INSTALL_DATA	= $(INSTALL) -m 644