Getting java.lang.NoClassDefFoundError for javax/xml/transform package classes in EAP 6

Issue

• We have a jar file which is globally available as a global module in EAP 6 in which we have a module.xml and corresponding jar in $JBOSS-HOME/modules/com.../main. The jar depends on javax.xml package classes all available in rt.jar (eg. in jdk.1.7.0_75).
  Therefore we have not declared any explicit dependencies on these javax.xml package classes, but we getting the following errors like:

Caused by: java.lang.NoClassDefFoundError: javax/xml/transform/Source

• We are able to circumvent that by adding stuff like:

<dependencies>
        <system export="true">
            <paths>
                <path name="javax/xml/transform"/>
            </paths>
        </system>
    </dependencies>

• It is somewhat strange that it should be necessary to declare dependencies on standard jdk classes. Are we doing something wrong, or is this really required to specify these dependencies?