Unable to rename app.js to app.coffee

Just tried to replace my app.js by a more beautiful app.coffee and got myself a nasty "Unhandled Exception" when using this plugin; the error was: 

`failed to find module "./" relative to: /`

My app.coffee code would be something like this:

```
application = require "application"
application.start moduleName: "main-page"
```

Where am I taking the wrong turn?
