{ config, pkgs, lib, ... }:
{
  nixpkgs.config.allowUnfree = true;
  nix.settings = {
    experimental-features = [ "nix-command" "flakes" ];
  };

  # Default to systemd-boot
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  # https://datatracker.ietf.org/doc/html/rfc8375
  networking.domain = "home.arpa";

  time.timeZone = "America/Chicago";

  i18n.defaultLocale = "en_US.UTF-8";
  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  console.font = null;  # Kernel will automatically choose a font.
  console.keyMap = "us";
  # 4-bit ANSI -> Catpuccin Mocha Colors: https://catppuccin.com/palette/
  console.colors = [
    "11111b"  # black               -> crust
    "f38ba8"  # red                 -> red
    "a6e3a1"  # green               -> green
    "fab387"  # yellow              -> peach
    "89b4fa"  # blue                -> blue
    "cba6f7"  # magenta             -> mauve
    "74c7ec"  # cyan                -> sapphire
    "6c7086"  # white               -> overlay 0
    "313244"  # bright black (gray) -> surface 0
    "eba0ac"  # bright red          -> maroon
    "94e2d5"  # bright green        -> teal
    "f9e2af"  # bright yellow       -> yellow
    "b4befe"  # bright blue         -> lavender
    "f5c2e7"  # bright magenta      -> pink
    "89dceb"  # bright cyan         -> sky
    "cdd6f4"  # bright white        -> text
  ];

  networking.firewall.enable = true;

  # Installed on every NixOS Host.
  environment.systemPackages = with pkgs; [
    wget curl
    ripgrep
  ];
  programs = {
    less = {
      enable = true;
      # https://ascending.wordpress.com/2011/02/11/unix-tip-make-less-more-friendly/
      # https://www.topbug.net/blog/2016/09/27/make-gnu-less-more-powerful/
      envVariables = {
        LESS = lib.concatStrings [
          "--quit-if-one-screen "
          "--ignore-case "
          "--long-prompt "
          "--raw-control-chars "  # raw ANSI colors
          "--hilite-unread "  # first unread line after forward screen
          "--tabs=4 "
          "--no-init "  # Don't use termcap init/deinit strings.
        ];
        # Render colors
        # TODO: Figure out how to represent those termcap sequences properly.
        #LESS_TERMCAP_mb=$'\E[1;31m'     # begin bold
        #LESS_TERMCAP_md=$'\E[1;36m'     # begin blink
        #LESS_TERMCAP_me=$'\E[0m'        # reset bold/blink
        #LESS_TERMCAP_so=$'\E[01;44;33m' # begin reverse video
        #LESS_TERMCAP_se=$'\E[0m'        # reset reverse video
        #LESS_TERMCAP_us=$'\E[1;32m'     # begin underline
        #LESS_TERMCAP_ue=$'\E[0m'        # reset underline
      };
    };

    git.enable = true;
    htop.enable = true;
    command-not-found.enable = false;
    bat.enable = true;
    bandwhich.enable = true;

    nano.enable = false;
    neovim = {
      enable = true;
      defaultEditor = true;

      viAlias = true;
      vimAlias = true;

      withRuby = true;
      withPython3 = true;
      withNodeJs = true;

      #configure = {};
    };
  };

  # Services running on all machines
  services.avahi.enable = true;  # zeroconf/mDNS(.local)
}