/**
  * Build command options, including the configured root directory
  * option, if not specified already.
  *
  * @param string|\string[] $flags
  *
  * @return string
  */
 protected function buildOptions($flags)
 {
     if ($magento_root = $this->config->get('rocketeer-magento::magento_root')) {
         if (!isset($flags['--root-dir'])) {
             $flags['--root-dir'] = $magento_root;
         }
     }
     return parent::buildOptions($flags);
 }