diff -Naur -x '*~' ocamlgraph-1.8.1/Makefile.in ocamlgraph-1.8.1-new//Makefile.in
--- ocamlgraph-1.8.1/Makefile.in	2011-10-17 09:57:03.000000000 -0430
+++ ocamlgraph-1.8.1-new//Makefile.in	2011-11-24 13:01:22.626004819 -0430
@@ -16,8 +16,8 @@
 ##########################################################################
 
 # Where to install the binaries
-DESTDIR	=
 prefix	=@prefix@
+DESTDIR=$(prefix)
 exec_prefix=@exec_prefix@
 datarootdir=@datarootdir@
 BINDIR	=$(DESTDIR)@bindir@