--- Makefile.orig	2023-04-24 14:50:58.000000000 -0500
+++ Makefile	2023-04-25 05:30:30.000000000 -0500
@@ -34,7 +34,7 @@
 ###
 # installation options
 #
-prefix = /usr/local
+prefix = %PREFIX%
 PREFIX = $(prefix)
 PROG = di
 MPROG = mi