General How do I force a different clover jar to be used?

You don't! Clover has now separated the Clover jar from it's license and thus there's now no need to provide a custom jar. However you'll still need to provide your own license (unless you're using this plugin on an open source project). You specify your own license using the maven.clover.license.path property. maven.clover.license.path = /some/path/to/my/clover.license