Deployment of Switchyard application fails with java.lang.NoClassDefFoundError: org/switchyard/component/bean/ReferenceInvoker

Issue

We are using ReferenceInvoker for bean invocation, as we need to enrich the context. The code is similar to this modified sample from the Switchyard quickstarts:

import org.switchyard.component.bean.Reference;
import org.switchyard.component.bean.ReferenceInvocation;
import org.switchyard.component.bean.ReferenceInvoker;
import org.switchyard.component.bean.Service;

@Service(OrderService.class)
public class OrderServiceBean implements OrderService {

    @Inject 
    @Reference("InventoryService")
    private ReferenceInvoker service;  // USE ReferenceInvoker

    @Override
    public OrderAck submitOrder(Order order) {
        // Create an order ack
        OrderAck orderAck = new OrderAck().setOrderId(order.getOrderId());
        // Check the inventory
        try {
            ReferenceInvocation invoker = service.newInvocation("lookupItem").invoke(order.getItemId());
            Item orderItem = (Item)invoker.getMessage().getContent();

When this Switchyard application is deployed inside an *.ear archive, the deployment fails with the following error:

12:45:58,134 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-4) MSC000001: Failed to start service jboss.deployment.subunit."switchyard-quickstart-ear-deployment-assembly-1.1.1-p11-redhat-1.ear"."switchyard-quickstart-ear-deployment-order-service-1.1.1-p11-redhat-1.jar".SwitchYardService: org.jboss.msc.service.StartException in service jboss.deployment.subunit."switchyard-quickstart-ear-deployment-assembly-1.1.1-p11-redhat-1.ear"."switchyard-quickstart-ear-deployment-order-service-1.1.1-p11-redhat-1.jar".SwitchYardService: com.google.common.collect.ComputationException: org.jboss.weld.exceptions.WeldException: by java.lang.NoClassDefFoundError: org/switchyard/component/bean/ReferenceInvoker
    at org.switchyard.as7.extension.services.SwitchYardService.start(SwitchYardService.java:84)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
    at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]
Caused by: com.google.common.collect.ComputationException: org.jboss.weld.exceptions.WeldException: by java.lang.NoClassDefFoundError: org/switchyard/component/bean/ReferenceInvoker

Deploying the same code as plain *.jar works without issues. How can this be resolved?