gistfile1.pl

==> foo.pl <==
use strict;
use warnings;
use Moose::Meta::Class;
use Moose::Util;

my $builder_meta = Moose::Meta::Class->create(
    't::Utils::HTTPRequestBuilder' => (
        superclass => 'Moose::Meta::Class',
        roles => [qw(
            HTTP::Engine::Role::RequestBuilder
            HTTP::Engine::Role::RequestBuilder::ParseEnv
        )],
    )
);
warn "OK";

==> lib/HTTP/Engine/Role/RequestBuilder.pm <==
package HTTP::Engine::Role::RequestBuilder;
use Moose::Role;

requires "_build_cookies";

1;

==> lib/HTTP/Engine/Role/RequestBuilder/ParseEnv.pm <==
package HTTP::Engine::Role::RequestBuilder::ParseEnv;
use Moose::Role;

with 'HTTP::Engine::Role::RequestBuilder::Standard' => {
    alias => {
        _build_hostname => '_aliased',
    }
};

sub _build_hostname        { }

1;


==> lib/HTTP/Engine/Role/RequestBuilder/Standard.pm <==
package HTTP::Engine::Role::RequestBuilder::Standard;
use Moose::Role;

sub _build_cookies  { }
sub _build_hostname { }

1;