--- graphviz-2.30.0/configure.ac.orig	2013-01-19 19:53:28.130842902 +0100
+++ graphviz-2.30.0/configure.ac	2013-01-19 19:56:44.934172133 +0100
@@ -1549,12 +1549,12 @@
         if test "x$RUBY" = "x"; then
 	  use_ruby="No (ruby not available)"
         else
-          RUBY_CFLAGS="-I`$RUBY $srcdir/config/config_ruby.rb archdir`"
+          RUBY_CFLAGS="-I`$RUBY $srcdir/config/config_ruby.rb archdir` "
 	  # hack for powerpc-darwin8 (10.4)
 	  if test "x$DARWIN" = "xyes"; then
 	    RUBY_CFLAGS=`echo $RUBY_CFLAGS | sed 's/powerpc/universal/'`
 	  fi
-          RUBY_LIBS="-L`$RUBY $srcdir/config/config_ruby.rb lib` `$RUBY -rrbconfig -e \"puts Config::CONFIG[['LIBRUBYARG_SHARED']]\"`"
+          RUBY_LIBS="-L`$RUBY $srcdir/config/config_ruby.rb lib` $($RUBY -rrbconfig -e "puts Config::CONFIG[['LIBRUBYARG_SHARED']]")"
           RUBY_INSTALL_DIR="`$RUBY $srcdir/config/config_ruby.rb vendorarchdir`"
 	  if test "x$RUBY_INSTALL_DIR" = "x"; then
 	  	RUBY_INSTALL_DIR="`$RUBY $srcdir/config/config_ruby.rb sitearchdir`"
--- graphviz-2.30.0/config/config_ruby.rb.orig	2013-01-19 19:53:28.134176235 +0100
+++ graphviz-2.30.0/config/config_ruby.rb	2013-01-19 19:58:10.874170341 +0100
@@ -8,6 +8,10 @@
     puts Config::expand(CONFIG["archdir"])
 when "lib"
     puts Config::expand(CONFIG["libdir"])
+when "includes"
+    puts Config::expand(CONFIG["rubyhdrdir"])
+when "archincludes"
+    puts Config::expand(CONFIG["rubyhdrdir"]+"/"+CONFIG["arch"])
 when "vendorarchdir"
     puts Config::expand(CONFIG["vendorarchdir"])
 when "sitearchdir"