 <p>browserify needs an absolute path to retrieve the file and it leaves that as the bundle key. The way to fix it is to use the <code>expose</code> option...</p> <p>In your build..</p> <pre><code>var dependencies = [ 'lodash', {file: './test.js', expose: 'test'}, ]; </code></pre> <p>and in app.js...</p> <pre><code>var _ = require('lodash'); var test = require('test'); </code></pre>