private function createPhpProcessBuilder(OutputInterface $output, $address)
    {
        $router = realpath(__DIR__ . '/../../Resources/bin/router.php');
        $finder = new PhpExecutableFinder();

        if (false === $binary = $finder->find()) {
            $output->writeln('<error>Unable to find PHP binary to run server</error>');

            return;
        }

        return new ProcessBuilder([$binary, '-S', $address, $router]);
    }