Switch stylesheets in an Ember CLI application

I'm creating an application using Ember CLI. The user should have the option to switch the theme.

There are two Less files (theme-one.less and theme-two.less), one for every theme.

I'm looking for the Ember-way to conditionally load either the 'theme one' or 'theme two' file. Is there an Ember-way, or should I manually update the href attribute of the CSS <link> element?