>>67
Racket's GUI stuff is the best I've ever used.
It's also got the standard ncurses bindings somewhere (or maybe not and I had to generate it for myself) or at least some ansi terminal library, if you ever wanted to go curses again. Have fun!

Meanwhile I'm the guy who tried to set up GuixSD. I'm running NixOS very happily now.
I've been laying groundwork and writing the necessary libraries to write a Game Boy Advance game in very-type-safe Haskell.