Npm 离子2示例会议应用程序can'；找不到babelify模块

我正在学习离子2。我认为示例应用程序是一个很好的起点，但不幸的是，我无法让它工作。它抱怨缺少模块。请查看输出：

lola@ubuntu:~/pj/ionic-conference-app$ ionic serve

Running 'serve:before' gulp task before serve 
[08:53:57] Starting 'sass'...
[08:53:57] Starting 'html'...
[08:53:57] Starting 'fonts'...
[08:53:57] Starting 'scripts'...
[08:53:57] Finished 'scripts' after 63 ms
[08:53:57] Finished 'html' after 115 ms
[08:53:57] Finished 'fonts' after 114 ms
[08:53:58] Finished 'sass' after 888 ms
[08:53:58] Starting 'watch'...
✗ Caught exception:
Error: Cannot find module 'babelify' from '/home/lola/pj/ionic-conference-app'
at /home/lola/pj/ionic-conference-app/node_modules/ionic-gulp-browserify-es2015/node_modules/browserify/node_modules/resolve/lib/async.js:46:17
at process (/home/lola/pj/ionic-conference-app/node_modules/ionic-gulp-browserify-es2015/node_modules/browserify/node_modules/resolve/lib/async.js:173:43)
at ondir (/home/lola/pj/ionic-conference-app/node_modules/ionic-gulp-browserify-es2015/node_modules/browserify/node_modules/resolve/lib/async.js:188:17)
at load (/home/lola/pj/ionic-conference-app/node_modules/ionic-gulp-browserify-es2015/node_modules/browserify/node_modules/resolve/lib/async.js:69:43)
at onex (/home/lola/pj/ionic-conference-app/node_modules/ionic-gulp-browserify-es2015/node_modules/browserify/node_modules/resolve/lib/async.js:92:31)
at /home/lola/pj/ionic-conference-app/node_modules/ionic-gulp-browserify-es2015/node_modules/browserify/node_modules/resolve/lib/async.js:22:47
at FSReqWrap.oncomplete (fs.js:82:15) 

Mind letting us know? https://github.com/driftyco/ionic-cli/issues

$ionic info

Your system information:

Cordova CLI: 6.1.1
Ionic Version: 2.0.0-beta.3
Ionic CLI Version: 2.0.0-beta.22
Ionic App Lib Version: 2.0.0-beta.12
OS:
Node Version: v4.4.2

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有人能帮我吗？

很可能，您需要更新NPM，其中将包括babelify依赖项。通过运行

NPM-v

检查您的NPM版本，它应该是v3.x。运行sudo

npm安装-g npm

更新npm。你应该可以走了。

只是

npm安装在projectroot中对我有用
 您是否运行了
npm install
我相信没有必要在全球范围内安装项目包，本地安装就足够了