gyp ERR! build error gyp ERR! stack Error: `make` failed with exit code: 2 gyp ERR! stack at ChildPr

gyp ERR! build error
gyp ERR! stack Error: make failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:262:23)
gyp ERR! stack at ChildProcess.emit (events.js:182:13)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:239:12)
gyp ERR! System Darwin 16.7.0
gyp ERR! command “/usr/local/Cellar/node/10.9.0/bin/node” “/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js” “rebuild”
gyp ERR! cwd /Users/zhangying/Documents/www/kurento/kurento-client-js/node_modules/utf-8-validate
gyp ERR! node -v v10.9.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm WARN [email protected] requires a peer of grunt@~0.4.1 but none is installed. You must install peer dependencies yourself.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] install: node-gyp rebuild
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/zhangying/.npm/_logs/2018-09-08T03_07_51_380Z-debug.log

方法一：
npm install -g bcrypt
方法二：
删除~/.node-gyp
方法三：
切换到当前项目下即可。

rm -rf .node-gyp/

npm install -g node-gyp

rm -rf 项目/node_modules

再次，npm install即可。