npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! grpc@1.20.0 install: `node-pre-gyp install --fallback-to-build --library=static_library`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the grpc@1.20.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
可能是什么问题?谢谢!