protected function createConfigFiles() {
    $this->logger->info("Creating configuration files for Drupal VM...");

    $this->taskFilesystemStack()
      ->mkdir($this->vmDir)
      ->copy($this->defaultDrupalVmConfigFile, $this->projectDrupalVmConfigFile,
        TRUE)
      ->copy($this->defaultDrupalVmVagrantfile,
        $this->projectDrupalVmVagrantfile, TRUE)
      ->stopOnFail()
      ->setVerbosityThreshold(VerbosityThresholdInterface::VERBOSITY_VERBOSE)
      ->run();
  }