Configured for ${gwt-platform} platform. Requirements for classpath: ${gwt-location}/gwt-dev-${gwt-platform}.jar ${gwt-location}/gwt-user.jar ${toolkit-jar-location} ${client-side-src-location} Output will be written into ${client-side-destination} Compiling com.itmill.toolkit.demo.colorpicker.gwt.ColorPickerWidgetSet. Modify this example ant-script to compile your own widgetsets.