Yes it is new and I wasn’t the first to spot it: hanekomu’s Perl blog: Metadata on search.cpan.org

Hanekomu shows how to implement it in Module::Install. And Alexandr Ciornii comment points to how it can be done in Module::Build.

This is what you need to do in Module::Build (see meta_merge part):

use strict;
use warnings;
use Module::Build;

my $builder = Module::Build->new(
    module_name         => 'Builder',
    license             => 'perl',
    dist_author         => 'Barry Walsh <draegtun@cpan.org>',
    dist_version_from   => 'lib/Builder.pm',
    build_requires => {
        'Test::More' => 0,
        'Carp'       => 0,
    },
    add_to_cleanup      => [ 'Builder-*' ],
    create_makefile_pl  => 'traditional',

    meta_merge => {
      resources => {
          bugtracker => 'http://rt.cpan.org/NoAuth/Bugs.html?Dist=Builder',
          repository  => 'http://github.com/draegtun/builder/tree/master'
      }
    },
);

$builder->create_build_script();

Running “./Build distmeta” produces the correct META.yml

/I3az/