GWT 2.8.0-SNAPSHOT jsinterop missing module

Hi, I'm using the GWT 2.8.0-SNAPSHOT along with the Mojo GWT plugin (same version). Been working fine all week, but today I suddenly get this error message when doing a build: 

[INFO] --- gwt-maven-plugin:2.8.0-SNAPSHOT:compile (default) @ ritual-designer-bs ---

[INFO] Loading inherited module 'com.mjeffw.gurps.ritualdesigner.RitualDesignerBS'

[INFO]    Loading inherited module 'com.google.gwt.core.Core'

[INFO]       Loading inherited module 'jsinterop.annotations.Annotations'

[INFO]          [ERROR] Unable to find 'jsinterop/annotations/Annotations.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?

Any ideas on how to solve this?

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