on configure => sub {
    requires 'ExtUtils::MakeMaker::CPANfile';
    requires 'File::Which';
};
recommends 'ExtUtils::PkgConfig';
recommends 'Alien::cmake3';
requires 'Promise::XS' => 0.16;
requires 'X::Tiny' => 0.22;
on develop => sub {
    requires 'AnyEvent';
    requires 'IO::Async';
    requires 'Mojo::IOLoop' if $^V ge v5.16.0;
};
on test => sub {
    requires 'Test::Fatal';
    requires 'Test::FailWarnings';
    requires 'Test::Deep';
};