can't log eloquent (non orm) queries outside laravel

I'm trying to log the query builder queries of eloquent outside laravel with this code. You can see the various var_dump and their results a comment. What would be the proper way to log the queries ?

<?php


use Illuminate\Database\Capsule\Manager as Capsule;


class DbSql
{

    public function db()
    {
        $capsule = new Capsule;
        $capsule->addConnection( [
            'driver'    => Settings::DATABASE_DRIVER,
            'host'      => Settings::DATABASE_HOST,
            'database'  => Settings::DATABASE_NAME,
            'username'  => Settings::DATABASE_USERNAME,
            'password'  => Settings::DATABASE_PASSWORD,
            'charset'   => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix'    => ''
        ] );

        # Make this Capsule instance available globally via static methods... (optional)
        $capsule->setAsGlobal();

        # $GLOBALS[ 'debugbar' ][ "messages" ]->addMessage( "Db access" );

        // Enabling query log
        $capsule->connection()->enableQueryLog();

        // Dumps nothing
        $capsule->connection()->listen( function( $query ) {
            var_dump( $query );
        } );

        // Dumps an empty array
        var_dump( $capsule->connection()->getQueryLog() );

        return $capsule;
    }

}

via Robert Brax