Modify this example Ant script to compile your own widget sets. Requirements for classpath: ${gwt-location}/gwt-dev.jar ${gwt-location}/gwt-user.jar ${gwt-location}/validation-api-1.0.0.GA.jar ${gwt-location}/validation-api-1.0.0.GA-sources.jar ${vaadin-jar-location} ${src-location} Output will be written into ${client-side-destination} Compiling ${widgetset}...