diff -Naur Makefile.orig Makefile
--- xfplan-0.1/Makefile.orig    2005-06-01 21:48:31.000000000 -0400
+++ xfplan-0.1/Makefile        2005-06-01 22:09:36.000000000 -0400
@@ -165,8 +165,8 @@
 
 
 # For Mac OSX, use these settings:
-#prefix = /sw
-#CCOPTS = -no-cpp-precomp -I/sw/include
+prefix = @PREFIX@
+CCOPTS = -no-cpp-precomp -I@PREFIX@/include
 
 # ---------------------------------------------------------------------------
 # Define any additional flags required by the loader for the link phase,

diff -Naur config.h config.h.new
--- xfplan-0.1/config.h    2005-06-01 21:48:31.000000000 -0400
+++ xfplan-0.1/config.h.new        2005-06-01 22:01:22.000000000 -0400
@@ -33,7 +33,7 @@
 
 #ifndef	DEFAULT_FPLAN_PATH
 #define	DEFAULT_FPLAN_PATH	\
-	"/usr/local/share/fplan:/usr/share/fplan:./data:./Data"
+	"@PREFIX@/share/fplan:@PREFIX@/fplan:./data:./Data"
 #endif
 
 #define	DIR_SEPARATOR_STR	"/"