diff -up graphviz-2.26.3/configure.fc15 graphviz-2.26.3/configure
--- graphviz-2.26.3/configure.fc15	2011-01-21 13:55:37.913416407 +0000
+++ graphviz-2.26.3/configure	2011-01-21 14:01:48.333416483 +0000
@@ -27576,7 +27576,9 @@ fi
       else
         RUBY_INCLUDES="-I`$RUBY $srcdir/config/config_ruby.rb INCLUDES`"
 	# hack for powerpc-darwin8 (10.4)
-	RUBY_INCLUDES=`echo $RUBY_INCLUDES | sed 's/powerpc/universal/'`
+	if test "x$DARWIN" = "xyes"; then
+	  RUBY_INCLUDES=`echo $RUBY_INCLUDES | sed 's/powerpc/universal/'`
+	fi
         RUBY_LIBS="-L`$RUBY $srcdir/config/config_ruby.rb lib` `$RUBY -rrbconfig -e \"puts Config::CONFIG['LIBRUBYARG_SHARED']\"`"
         RUBY_INSTALL_DIR="`$RUBY $srcdir/config/config_ruby.rb archsitelib`"
         save_CPPFLAGS=$CPPFLAGS