protected function runCleanTask($outputDir)
    {
        $cleanTime = $this->runTimedTask(function () use ($outputDir) {
            $this->builder->clean($outputDir);
        });

        $this->output->writeln(
            "<comment>Cleaned <path>{$outputDir}</path> in <time>{$cleanTime}ms</time></comment>",
            OutputInterface::VERBOSITY_VERBOSE
        );
    }