--- Makefile.orig	Thu Feb 16 22:39:41 1995
+++ Makefile	Thu Feb 26 01:03:28 1998
@@ -1,5 +1,5 @@
-CFLAGS=$(OPT) $(DEFINES)
-OPT=-O
+CFLAGS+=$(OPT) $(DEFINES)
+#OPT=-O
 
 
 #Uncomment the following line if your system does not have strchr()
@@ -28,7 +28,7 @@
 UNPACKOBJS = unixunpk.o decode.o uudecode.o codes.o unixos.o string.o \
 		part.o xmalloc.o md5c.o getopt.o
 
-DESTDIR=/usr/local
+DESTDIR=${PREFIX}
 
 all: mpack munpack
 
@@ -42,10 +42,10 @@
 	-mkdir $(DESTDIR)/bin
 	-mkdir $(DESTDIR)/man
 	-mkdir $(DESTDIR)/man/man1
-	install -s -m 755 mpack $(DESTDIR)/bin
-	install -s -m 755 munpack $(DESTDIR)/bin
-	install -m 644 unixpk.man $(DESTDIR)/man/man1/mpack.1
-	install -m 644 unixunpk.man $(DESTDIR)/man/man1/munpack.1
+	install -c -s -m 755 mpack $(DESTDIR)/bin
+	install -c -s -m 755 munpack $(DESTDIR)/bin
+	install -c -m 644 unixpk.man $(DESTDIR)/man/man1/mpack.1
+	install -c -m 644 unixunpk.man $(DESTDIR)/man/man1/munpack.1
 
 clean:
 	rm -f *.o mpack munpack