labrador create的时候提示连接失败，求解。

[niuyi]

labrador create的时候提示网络连接错误 https://registry.yarnpkg.com/babel-plugin-transform-export-extensions: connect ETIMEDOUT 104.16.59.173:443"，请问下这个是需要设置代理吗？ 谢谢指教

======================= 全部的错误信息 ===============================
D:\Code\test> labrador create demo
下载初始项目...
下载完毕
安装npm依赖
yarn install v0.21.3
info No lockfile found.
warning [email protected]: No license field
[1/4] Resolving packages...
warning There appears to be trouble with your network connection. Retrying...
error An unexpected error occurred: "https://registry.yarnpkg.com/babel-plugin-transform-export-extensions: connect ETIM
EDOUT 104.16.59.173:443".
info If you think this is a bug, please open a bug report with the information provided in "D:\Code\test\demo\yarn-e
rror.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
child_process.js:532
throw err;