--- configure.ac.orig	2015-04-07 10:01:12 UTC
+++ configure.ac
@@ -113,7 +113,7 @@ AS_IF([test "x$enable_shmapi" != xno],
 
 
 
-AC_DEFINE([DEFAULT_CONFIG], ["/etc/umurmur.conf"], [Default config])
+AC_DEFINE([DEFAULT_CONFIG], ["%%PREFIX%%/etc/umurmur.conf"], [Default config])
 
 # Checks for header files.
 AC_FUNC_ALLOCA