Bundling as a jar

[dpost]

I'm trying to use geb-mobile but distribute it as a local jar to prevent test maintainers from inadvertently altering the core geb-mobile drivers. I've been successful in generating a jar from the project, or installing it in my local maven repo, but when I use it in the tests I get the following error:

Execution failed for task ':compileTestGroovy'.

Unable to load class geb.mobile.GebMobileBaseSpec due to missing dependency spock/lang/MockingApi

Do you know how to use geb-mobile in this way?