Vaadin Clojure Widget Compilation without Maven

I am developing an application using clojure and vaadin. I am trying to use the ace editor widget from vaadin add-ons. I have added the maven repo to my leiningen file and I can get the jar just fine, However when I try to use it I get a,

Widgetset does not contain implementation for org.vaadin.aceeditor.AceEditor. 
Check its @ClientWidget mapping, widgetsets GWT module description file and 
re-compile your widgetset.

error on the browser. Their documentation assumes everyone either uses maven or eclipse. So my question is what exactly does the eclipse plugin is doing behind the scenes so I can write a script to emulate that in leiningen? (I am not familiar neither with GWT or maven)