Hi Alberto,
IIUC, you don’t want to use the annotation processor in your Groovy source set. Since Gradle detects that you have annotation processing enabled for Groovy compilation, that means that the Lombok annotation processor ended up on the options.annotationProcessorPath. I suppose the io.freefair.lombok plugin adds it there. In order to disable annotation processing, can add -proc:none to options.comilerArgs or clear the `annotationProcessorPath.
Hope that helps,
Stefan