a server side mustache.js example using node.js

I'm looking for an example using Mustachejs with Nodejs

here is my example but it is not working. Mustache is undefined. I'm using Mustachejs from the master branch.

var sys = require('sys');
var m = require("./mustache");

var view = {
  title: "Joe",
  calc: function() {
    return 2 + 4;
  }
};    
var template = "{{title}} spends {{calc}}";    
var html = Mustache().to_html(template, view);

sys.puts(html);