--- ./Makefile	2026-04-12 13:26:59
+++ ./Makefile	2026-04-22 13:15:00
@@ -13,9 +13,10 @@
 
 ADD_CFLAGS  = # -DVI_KEYS
 
-DESTDIR     = /usr
-BINDIR      = $(DESTDIR)/bin
-MANDIR      = $(DESTDIR)/share/man/man1
+DESTDIR     ?=
+PREFIX      ?= /opt/local
+BINDIR      = $(DESTDIR)$(PREFIX)/bin
+MANDIR      = $(DESTDIR)$(PREFIX)/share/man/man1
 
 
 # Uncomment the lines for your system (default is linux)
