> Have you worked with Haskell professionally?

Not yet. I was seriously interested in Haskell. The cabal hell however put me back. Stack is interesting but installation from source is still troublesome.

I always want to be able to install my developer tools from scratch (by source only) since I want to make sure that I can port my software to new systems. Haskell's and Rust's way of installation (curl | sh) is convenient but inacceptable for porting. Nim's bootstrap from source (no dependencies except a C compiler) is the right way how it should be.