title: gulp command not found (Mac OS)
body: <p>I have been trying to setup an angular js project with yo, grunt and generator-gulp-angular. Although I install all packages, gulp comand is not found, however it works if I go inside node_modules.</p>
  
  <p>This code will explain my issue:</p>
  
  <pre><code>$ npm -v
  # 2.5.1
  $ npm install -g yo
  $ npm install -g generator-gulp-angular
  $ mkdir client &amp;&amp; cd $_
  $ yo gulp-angular ng_demo
  $ gulp serve
  # command not found
  $ node_modules/gulp/bin/gulp.js serve
  # works
  </code></pre>
  
  <p>I am using zsh. What may be going wrong?</p>