Style-loader in Meteor? or some better way?

I’m trying to use in my Meteor app but I have some trouble to get it working. It is supposed to be installed with a theme: which tries to load some css via:

var css = require('./lib/styles.css');

and then uses it like this:

var notificationsSystemClassName = css['notifications-system'];

But this doesn’t work in Meteor, I guess it requires but I have no idea how to integrate this in Meteor.

Any tips?