requirejs optimize node app

requirejs question.md

Given Node.js app with a CJS requires.

app.js

// Depends on underscore
var _ = require('underscore');
var mult = require('./mult');

var app = {
  x: 1,
  y: 2,
  
  multArray: function(arr){ return _.map(arr, mult); }
}

module.exports = app;

I want to optimize app.js into AMD module and instead of inlining underscore substitute it with require('cdn.underscore'). Because in browser environment underscore will already be present with this name and I don't want to include it again.

Can I set up r.js optimizer in a way it will handle this situation?