Excluding transitive dependencies in the new software model

Previously I could do something like this:

dependencies {
  compile('jaxen:jaxen:1.1.6') {
    exclude module: 'xml-apis'

Is there any way to do the same in the new software model? The documentation on ModuleDependencySpecBuilder suggests not.

Currently, no. The goal however is for dependency management with the software model to reach feature parity with that of the current model.