We cannot do a simple text replace, someone could legitimately write `module.exports` in a string of text or in a variable name, and we don't want it to be replaced by `"harmony"`. Maybe there is a way to disable this feature in traceur? Otherwise we should use something like [Grasp](http://graspjs.com/). If needed I've written a [Grasp wrapper for Meteor](https://github.com/mquandalle/meteor-minifiers/blob/master/grasp.js).