protected function setFileSystem()
{
vfsStreamWrapper::register();
$root = vfsStream::newDirectory('build');
vfsStreamWrapper::setRoot($root);
$packagesBuilder = new PackagesBuilder(new NullOutput(), vfsStream::url('build'), ['repositories' => [['type' => 'composer', 'url' => 'http://localhost:54715']], 'require' => ['vendor/name' => '*']], false);
$packagesBuilder->dump([$this->package]);
return $root;
}