Get error running camel example in embedded Servicemix

In SMX 4, when I try to run the Camel example in embedded servicemix the README.txt say to type

cd camel-sa
mvn jbi:servicemix

there is a link at the bottom to a page on the servicemix website (http://servicemix.apache.org/camel-example.html)

That page says to type

cd samples/camel
mvn install
cd camel-sa
mvn jbi:servicemix

I get the follow error

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'camelContext:beanPostProcessor': Cannot resolve reference to bean 'camelContext' while setting bean property 'camelContext'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'camelContext': Invocation of init method failed; nested exception is java.lang.NoSuchMethodError: org.apache.camel.util.ObjectHelper.getSystemProperty(Ljava/lang/String;Ljava/lang/Boolean;)Z

the full maven build output is attached.

Deploying the demo into an existing servicemix container worked fine.