In reply to @aethrvmn "Hey, I've been thinking": as I understand it, by
default (without `nimble setup`) when you add `require`s to your project - nim
will search for libraries and use the lowest compatible version.

If you do `nimble setup` - it locks the exact version of library you use by
hard-coding the path.

I've personally haven't used `nimble setup` much. You don't "need" to do it.

> why if you do nimble setup on a pre-existing project it wipes the config.nims

It doesn't? I've tried right now - it just adds a couple lines to existing
`config.nims`.