--- Makefile.orig	2014-01-07 14:47:56.000000000 +0800
+++ Makefile	2014-01-07 14:48:06.000000000 +0800
@@ -9,7 +9,7 @@ chiconv: chiconv.c
 	$(CC) ${CFLAGS} -o chiconv chiconv.c ${LIBS}
 
 install:
-	install -m 555 chiconv ${PREFIX}/bin
+	install -m 555 chiconv $(DESTDIR)${PREFIX}/bin
 
 clean:
 	rm -f chiconv