CentOS6 上 ide.sh build 时进度卡住

[yitro-z-wang]

运行 ./ide.sh build 时一直保持在此条语句，没有任何进展。
npm http 200 https://registry.npm.taobao.org/brace/download/brace-0.8.0.tgz

倒数10行输出为：
npm http 304 https://registry.npm.taobao.org/lodash
npm http 304 https://registry.npm.taobao.org/octicons
npm http 304 https://registry.npm.taobao.org/querystring
npm http 304 https://registry.npm.taobao.org/react
npm http 304 https://registry.npm.taobao.org/react-notification
npm http 304 https://registry.npm.taobao.org/brace
npm http GET https://registry.npm.taobao.org/brace/download/brace-0.8.0.tgz
npm http 304 https://registry.npm.taobao.org/react-redux
npm http 304 https://registry.npm.taobao.org/react-dom
npm http 200 https://registry.npm.taobao.org/brace/download/brace-0.8.0.tgz