--- Makefile.orig	Sat May 29 14:13:39 1999
+++ Makefile	Sat May 29 14:14:38 1999
@@ -1,7 +1,7 @@
 # Add -I and -L options as necessary to make it find your X stuff....
 
 #DESTDIR = /opt/blockade
-DESTDIR = /usr/local
+DESTDIR = $(PREFIX) 
 BINDIR = $(DESTDIR)/bin
 MANDIR = $(DESTDIR)/man/man6
 
@@ -22,7 +22,7 @@
 #LDFLAGS = -s -L/usr/lib/X11R4 -lX11
 
 # Linux
-CFLAGS = -DSYSV -I/usr/include/X11 -Wall
+CFLAGS += -I$(X11BASE)/include
 LDFLAGS = -L/usr/X11R6/lib -lX11
 
 SOUND = blockade-snd.o