Why don't you just write your tests to skip if the required module is unavailable? I have many tests that basically do:

my $can_run;
my $reason;
BEGIN {
    $can_run = eval {
        require My::Module;
        require Some::Other::Module;
        1;
    };
    $reason = $@;
};

use Test::More;

if (! $can_run) {
    $reason ||= "no reason given";
    plan skip_all => "Prerequisite module not found ($reason)";
    exit;
} else {
    plan tests => 42;
};

...
[download]

Also, I find the idea of "standard" amusing/confusing - does that mean that all modules currently using ExtUtils::MakeMaker will go out of existence or that people will hurry to Module::Build because nobody cares about compatibility with older versions of Perl anymore?