#!/usr/bin/perl 
package My::Config;

use Moose;
with 'MooseX::SimpleConfig';

sub new_from_config_shortname {
    my ($class, $filename) = @_;
    $class->new_from_config( configfile => '/some/path/' . $filename . ".yaml" );
}

my $config = My::Config->new_from_config_shortname("config");