@aria42 You need Lein 2.8.3 or newer to use the modern nREPL.

Older versions have tools.nrepl as a hardcoded and non-overridable dep.

> Is this due to lein’s dependency on that? I believe I should be overriding, but because the package is different, not sure if I’m actually overriding.

Generally you can’t override different artifacts. 🙂