diff -urN udpcast.orig/Makefile udpcast/Makefile
--- udpcast.orig/Makefile	2003-03-25 21:34:57.000000000 +0000
+++ udpcast/Makefile	2003-03-25 21:35:24.000000000 +0000
@@ -4,6 +4,8 @@
 LDFLAGS = -g -s 
 LIBS=-lpthread
 
+DESTDIR = 
+
 all: udp-receiver udp-sender udp-receiver.1.gz udp-sender.1.gz
 #all: fec-test
 
@@ -15,8 +17,10 @@
 	rm -f *.o udp-sender udp-receiver udp-sender.1* udp-receiver.1* *~
 
 install: all
-	install -m 555 udp-sender udp-receiver /usr/sbin
-	install -m 644 udp-sender.1.gz udp-receiver.1.gz /usr/share/man/man1
+	mkdir -p $(DESTDIR)/usr/sbin
+	install -m 755 udp-sender udp-receiver $(DESTDIR)/usr/sbin
+	mkdir -p $(DESTDIR)/usr/share/man/man1
+	install -m 644 udp-sender.1.gz udp-receiver.1.gz $(DESTDIR)/usr/share/man/man1
 
 udp-sender: udp-sender.o socklib.o udpcast.o rate-limit.o \
 	sender-diskio.o senddata.o udps-negotiate.o \