我的机器上出现了一个奇怪而持续的问题。每当我安装一些新的npm依赖项时，gulp就会神奇地从node_modules文件夹中消失。
gulp当前作为devDependency安装为："gulp": "github:gulpjs/gulp"
如果我发出通常的npm install，一切都会恢复正常
要非常清楚：
$ npm install github:gulpjs/gulp --save-dev
npm WARN ajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.
+ gulp@4.0.0
added 183 packages in 26.452s
然后如果我尝试安装新的东西...
$ npm install eyeglass --verbose
npm info it worked if it ends with ok
npm verb cli [ '/Users/peach/.nvm/versions/node/v8.11.3/bin/node',
npm verb cli '/Users/peach/.nvm/versions/node/v8.11.3/bin/npm',
npm verb cli 'install',
npm verb cli 'eyeglass',
npm verb cli '--verbose' ]
npm info using npm@5.6.0
npm info using node@v8.11.3
npm verb npm-session 48e35d62250ec820
npm http fetch GET 200 https://registry.npmjs.org/eyeglass 15ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/ensure-symlink 20ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/archy 22ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/deasync 21ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/lodash.includes 20ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/fs-extra 21ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/lodash.merge 24ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/node-sass-utils 25ms (from cache)
npm http fetch GET 200 https://registry.npmjs.org/bindings 3ms (from cache)
npm verb correctMkdir /Users/peach/.npm/_locks correctMkdir not in flight; initializing
npm verb lock using /Users/peach/.npm/_locks/staging-89e2cc30db562072.lock for /Users/peach/repos/sotb-six/node_modules/.staging
npm info lifecycle gulp@4.0.0~preuninstall: gulp@4.0.0
npm info lifecycle gulp@4.0.0~uninstall: gulp@4.0.0
npm verb unbuild rmStuff gulp@4.0.0 from /Users/peach/repos/sotb-six/node_modules
npm info lifecycle gulp@4.0.0~postuninstall: gulp@4.0.0
...
+ eyeglass@1.5.0
removed 183 packages and updated 1 package in 10.707s
npm verb exit [ 0, true ]
npm info ok
随后会执行以下操作，但还会删除许多其他程序包...
不知道发生了什么，我很不幸试图为此找到解决方案
使用npm@5.6.0和node@v8.11.3
[edit]尝试删除package-lock.json并重新安装gulp，然后分别与$whateverpackage分开安装，但结果相同。
$ rm package-lock.json
$ npm install github:gulpjs/gulp
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN ajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.
+ gulp@4.0.0
added 183 packages in 32.953s
$ ls -l node_modules/.bin/gulp
lrwxr-xr-x 1 peach staff 19 Jul 9 13:24 node_modules/.bin/gulp -> ../gulp/bin/gulp.js
$ npm install eyeglass
npm WARN ajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.
+ eyeglass@1.5.0
removed 183 packages and updated 1 package in 12.959s
$ ls -l node_modules/.bin/gulp
ls: cannot access 'node_modules/.bin/gulp': No such file or directory