Sass Linker in Vaadin8's Vaadin.gwt.xml not found

Vaadin 6 / 7 / 8 Framework UI
1

Hi,

I want to debug some Client-Code using the superdevmode.
I use IntelliJ with a gwt-facet and the CodeServer runs till it doesn’t find the SassLinker. See:

Super Dev Mode starting up
   workDir: /var/folders/h7/hxgk10y11f1169lxprvhzcch0000gn/T/gwt-codeserver-9193064456964310183.tmp
   Loading inherited module 'MySuperWidgetset'
      Loading inherited module 'com.vaadin.addon.charts.Widgetset'
         Loading inherited module 'com.vaadin.DefaultWidgetSet'
            Loading inherited module 'com.vaadin.Vaadin'
               [ERROR]
 Line 88: Unable to load class 'com.vaadin.sass.linker.SassLinker'

I found the linker definition in Vaadin.gwt.xml which points to class com.vaadin.sass.linker.SassLinker.
The problem is that there’s no SassLinker in Vaadin8 anymore.

Is there another dependency needed to run superdevmode with Vaadin8?

Kind regards
Michael