protected function overrideEnvironmentVariables()
    {
        if (!isset($this->options->filtered['configuration'])) {
            return;
        }

        $variables = $this->options->filtered['configuration']->getEnvironmentVariables();

        foreach ($variables as $key => $value) {
            putenv(sprintf('%s=%s', $key, $value));

            $_ENV[$key] = $value;
        }
    }