Use Module::Build instead of ExtUtils::MakeMaker.

Build.PL

@@ -0,0 +1,12 @@
+#!/usr/bin/perl
+
+use strict;
+use Module::Build;
+
+Module::Build->new( module_name => 'File::DirWalk',
+                    author      => 'jens.luedicke@gmail.com',
+                    license     => 'perl',
+                    requires    => {'Test::Simple' => '0.72'},
+                    sign        => 1,
+                    create_makefile_pl => 'traditional',
+                  )->create_build_script;