{ config, pkgs, ... }:

# https://discourse.nixos.org/t/installing-only-a-single-package-from-unstable/5598/2

let
  unstable = import <nixos-unstable> { config = { allowUnfree = true; }; };
in {
  environment = {
    systemPackages = with pkgs; 
      [
        unstable.kitty
      ];
  };
}
