--- opal-3.10.9/configure.ac.orig	2013-02-02 11:32:55.486257032 +0100
+++ opal-3.10.9/configure.ac	2013-02-02 12:55:44.492820131 +0100
@@ -453,7 +453,7 @@
 if test "x$OPAL_RUBY" = "xyes" ; then
   AC_CHECK_PROG(HAS_RUBY,ruby,yes)
   if test "x$HAS_RUBY" = "xyes" ; then
-    RUBY_CFLAGS=-I`ruby -e 'puts $:.join(" -I")'`
+    RUBY_CFLAGS="$(ruby -r rbconfig -e 'printf("-I%s -I%s/%s", Config::CONFIG[["rubyhdrdir"]], Config::CONFIG[["rubyhdrdir"]], Config::CONFIG[["arch"]])' 2>/dev/null)"
     oldCFLAGS="$CFLAGS"
     oldCPPFLAGS="$CPPFLAGS"
     CFLAGS="$CFLAGS $RUBY_CFLAGS"
--- opal-3.10.9/opal_defs.mak.in.orig	2012-11-26 11:49:22.000000000 +0100
+++ opal-3.10.9/opal_defs.mak.in	2013-02-02 17:03:28.472510316 +0100
@@ -111,6 +111,7 @@
 OPAL_T38_CAP	  = @OPAL_T38_CAPABILITY@
 OPAL_FAX          = @OPAL_FAX@
 OPAL_JAVA         = @OPAL_JAVA@
+OPAL_RUBY         = @OPAL_RUBY@
 SPEEXDSP_SYSTEM   = @SPEEXDSP_SYSTEM@
 OPAL_HAS_MSRP	  = @OPAL_HAS_MSRP@
 OPAL_HAS_SIPIM	  = @OPAL_HAS_SIPIM@