--- configure.ac	2008-05-11 19:33:10.000000000 +0200
+++ configure.ac.new	2008-05-11 19:35:27.000000000 +0200
@@ -1972,7 +1972,9 @@
 
 AC_SUBST([DIX_CFLAGS])
 
-AC_SUBST([libdir exec_prefix prefix])
+AC_SUBST([libdir])
+AC_SUBST([exec_prefix])
+AC_SUBST([prefix])
 
 # Man page sections - used in config utils & generating man pages
 XORG_MANPAGE_SECTIONS