{
  config,
  inputs,
  lib,
  pkgs,
  this,
  ...
}:
with lib;
let
  cfg = config.nixfiles.modules.profiles.headful;
in
{
  options.nixfiles.modules.profiles.headful.enable = mkEnableOption "headful profile" // {
    default = this.isHeadful;
  };

  config = mkIf cfg.enable {
    nixfiles.modules = {
      profiles.dev.enable = true;

      alacritty.enable = mkDefault true;
      aria2.enable = true;
      chromium.enable = true;
      dwm.enable = mkDefault false;
      emacs.enable = true;
      firefox.enable = true;
      foot.enable = mkDefault true;
      kde.enable = mkDefault true;
      mpv.enable = true;
      nullmailer.enable = true;
      openssh.client.enable = true;
      password-store.enable = true;
      sound.enable = true;
      thunderbird.enable = true;
      vscode.enable = true;
      wayland.enable = mkDefault true;
      x11.enable = mkDefault true;
      zathura.enable = true;
    };

    hm = {
      imports = [ inputs.nix-index-database.hmModules.nix-index ];

      home = {
        file.".digrc".text = ''
          +answer
          +multiline
          +recurse
        '';

        packages = with pkgs; [
          anki
          audacity
          byedpi
          eaglemode
          element-desktop
          fd
          gimp
          imv
          kdenlive
          libreoffice-fresh
          mumble
          obs-studio
          qbittorrent
          ripgrep
          sd
          telegram-desktop
          tldr
          tor-browser-bundle-bin
          vesktop
        ];
      };

      programs = {
        bash.shellAliases.open = "xdg-open";

        nix-index-database.comma.enable = true;
      };
    };

    boot = {
      kernelPackages = mkDefault pkgs.linuxPackages_latest;

      kernelParams = [
        # https://wiki.archlinux.org/title/improving_performance#Watchdogs
        "nowatchdog"
        "kernel.nmi_watchdog=0"
        # A security risk I'm willing to take for a reason[1].
        #
        # [1]: https://www.phoronix.com/scan.php?page=article&item=spectre-meltdown-2&num=11
        "mitigations=off"
      ];

      loader = {
        efi.canTouchEfiVariables = true;

        systemd-boot = {
          enable = true;
          editor = false;
          configurationLimit = 10;
        };
      };
    };

    hardware.graphics.enable = true;

    nix = {
      daemonCPUSchedPolicy = "idle";
      daemonIOSchedClass = "idle";
      daemonIOSchedPriority = 7;

      gc.automatic = false;
      optimise.automatic = false;
    };

    programs = {
      dconf.enable = true;
      iftop.enable = true;
      mtr.enable = true;
    };

    services = {
      fwupd.enable = true;
      libinput.enable = true;
      upower.enable = true;
    };

    time.timeZone = "Europe/Moscow";

    environment.systemPackages = with pkgs; [
      brightnessctl
      lm_sensors
      usbutils
      wirelesstools
    ];

    my.extraGroups = [
      "audio"
      "input"
      "render"
      "video"
    ];

    # https://github.com/NixOS/nix/issues/3995#issuecomment-2081164515
    system.extraDependencies =
      let
        collectFlakeInputs =
          input: [ input ] ++ concatMap collectFlakeInputs (attrValues (input.inputs or { }));
      in
      concatMap collectFlakeInputs (attrValues inputs);
  };
}