The README advice for lein users currently recommends doing a `lein install`. This might have two negative side effects: 1. depending on how the folks have setup CI caching, the installed dep might get cached 2. there is a chance that the wrong version might get selected for the check So why not recommend a `lein jar` for lein users instead? And then we can use the same check usage advice as we do for `deps.edn` based projects.