Fix YAML for JRuby builds
Fix YAML for JRuby builds

ttasanen/oga,YorickPeterse/oga,ttasanen/oga,YorickPeterse/oga,ttasanen/oga,ttasanen/oga,YorickPeterse/oga,ttasanen/oga,YorickPeterse/oga,YorickPeterse/oga