It's been removed* - provided a bad UX for people coming into Nim since it doesn't support C extensions / importing of modules that use C extensions, which can

It's been removed* - provided a bad UX for people coming into Nim since it doesn't support C extensions / importing of modules that use C extensions, which can be a fair bit. If you try to use them regardless, it's easy to crash the REPL. * It's not entirely removed, just obfuscated so that if needed it can be still used as long as you "know what you're doing" and are willing to put up with it not being a general purpose REPL. Use nim secret to run it.