protected function makeFinder()
    {
        $directories = RootDirectories::getEnforceable();
        $found = [];

        $filesystem = new Filesystem();

        foreach ($directories as $directory) {
            if ($filesystem->exists($directory) && is_dir($directory)) {
                $found[] = $directory;
            }
        }

        return DefaultFinder::create()->in($found);
    }