Remember the days when everyone and their pet iguana was raving about Arch Linux? You couldn't escape the ever-so-subtle "I use Arch BTW" remarks in every Linux forum. Well, move over, Arch, because NixOS is here to steal your thunder! Nowadays, it seems that you can't browse YouTube or read a blog ...
Nix and Common Lisp seem to sit in the same space -- it's spoken of extremely fondly but has difficulty escaping the lab. For some reason it's extremely technically capable, but fails to find widespread adoption.