{
  inputs,
  lib,
  config,
  pkgs,
  unstablePkgs,
  ...
}: {
  imports = [
    # Include the results of the hardware scan.
    ./hardware-configuration.nix
    ./theming.nix
  ];

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  hardware.nvidia = {
    # Modesetting is required.
    modesetting.enable = true;
    powerManagement.enable = false;
    powerManagement.finegrained = false;
    open = false;
    nvidiaSettings = true;
    package = config.boot.kernelPackages.nvidiaPackages.stable;
  };
  hardware.nvidia-container-toolkit.enable = true;

  # Bootloader.
  boot = {
    loader = {
      grub = {
        enable = true;
        efiSupport = true;
        device = "nodev";
        useOSProber = true;
      };
      efi = {
        efiSysMountPoint = "/boot/efi";
        canTouchEfiVariables = true;
      };
    };
  };

  networking.hostName = "worklaptop"; # Define your hostname.

  # Enable networking
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Europe/Dublin";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_IE.UTF-8";

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

  nix = {
    registry = (lib.mapAttrs (_: flake: {inherit flake;})) ((lib.filterAttrs (_: lib.isType "flake")) inputs);
    nixPath = ["nixpkgs=${inputs.nixpkgs}"];
    settings = {
      experimental-features = "nix-command flakes";
      auto-optimise-store = true;
    };
    extraOptions = ''
      trusted-users = root cianh
    '';
  };

  environment.etc =
    lib.mapAttrs'
    (name: value: {
      name = "nix/path/${name}";
      value.source = value.flake;
    })
    config.nix.registry;

  # Load nvidia driver for Xorg and Wayland
  services = {
    xserver = {
      videoDrivers = ["nvidia"]; # or "nvidiaLegacy470 etc.
      enable = true;
      displayManager.gdm.enable = true;
      desktopManager.gnome.enable = false;
      xkb = {
        layout = "ie";
        variant = "";
      };
    };
  };

  # Configure console keymap
  console.keyMap = "ie";

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable sound with pipewire.
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  users.users.cianh = {
    isNormalUser = true;
    hashedPasswordFile = "/etc/hashedPasswordFile";
    description = "Cian Hughes";
    extraGroups = ["networkmanager" "wheel" "libvirtd"];
    shell = unstablePkgs.nushell;
  };
  # # The hack below sets the user profile image declaratively
  system.activationScripts.script.text = ''
    mkdir -p /var/lib/AccountsService/{icons,users}
    cp /home/cianh/Pictures/face.png /var/lib/AccountsService/icons/cianh
    echo "[User]
    Session=
    Icon=/var/lib/AccountsService/icons/cianh
    SystemAccount=false" > /var/lib/AccountsService/users/cianh
    chown root:root /var/lib/AccountsService/users/cianh
    chmod 0600 /var/lib/AccountsService/users/cianh
    chown root:root /var/lib/AccountsService/icons/cianh
    chmod 0444 /var/lib/AccountsService/icons/cianh
  '';

  # $ nix search wget
  environment.systemPackages =
    (with pkgs; [
      # shell env programs
      atuin
      bat
      bitwarden-cli
      bottom
      delta
      du-dust
      duf
      fastfetch
      fd
      fzf
      gdm
      gh
      git
      git-extras
      glab
      glow
      gnupg
      grub2_efi
      hexyl
      killall
      less
      libsecret
      mosh
      netcat-gnu
      nix-index
      nix-ld
      nmap
      nodejs
      openssl
      ouch
      pass
      passh
      phinger-cursors
      pinentry-gnome3
      pkg-config
      podman-compose
      powertop
      pueue
      qmk
      qmk-udev-rules
      qmk_hid
      ripgrep
      rm-improved
      seahorse
      starship
      tealdeer
      wget
      wl-clipboard
      xclip
      xcp
      xfce.thunar
      xfce.tumbler
      zellij
      zoxide
      # package managers
      flatpak
      # back-end dev tools
      brotli
      gcc
      gnumake
      # front-end dev environment
      micro
      # DE and accompanying tools
      wayland
      wayland-utils
      sway # More stable, backup DE
      hyprland
      hyprlock
      hyprpaper
      hyprpicker
      hyprshot
      xdg-desktop-portal-hyprland
      xdg-desktop-portal-wlr
      xdg-desktop-portal-gtk
      xdg-desktop-portal-xapp
    ])
    ++ (with unstablePkgs; [
      just
      ghostty
      kitty
      libnotify
      neovim
      nushell
      onefetch
      ruff
      serie
      swaynotificationcenter
      uv
      waybar
      wofi
      yazi
    ]);

  hardware.keyboard.qmk.enable = true;

  # Activate DEs
  programs.hyprland = {
    enable = true;
    xwayland.enable = true;
  };
  programs.sway = {
    enable = true;
    extraOptions = ["--unsupported-gpu"];
  };
  programs.neovim = {
    enable = true;
    defaultEditor = true;
    viAlias = true;
    vimAlias = true;
    withPython3 = true;
    withNodeJs = true;
    withRuby = true;
  };
  programs.waybar.enable = true;
  environment.sessionVariables.NIXOS_OZONE_WL = "1";

  # Enable my preferred DE utilities
  programs.thunar.enable = true;
  programs.thunar.plugins = with pkgs.xfce; [
    thunar-volman
    thunar-archive-plugin
    thunar-media-tags-plugin
  ];
  services.gvfs.enable = true;
  services.tumbler.enable = true;
  programs.xfconf.enable = true;
  xdg.portal = {
    enable = true;
    wlr.enable = true;
    extraPortals = [
      pkgs.xdg-desktop-portal-hyprland
      pkgs.xdg-desktop-portal-gtk
    ];
  };

  # Disable automatically activated programs i dont want
  programs.foot.enable = false;

  # Lets also activate some handy devenv tools
  programs.direnv.enable = true;
  programs.direnv.nix-direnv.enable = true;
  programs.nix-ld = {
    enable = true;
    libraries = with pkgs; [
      acl
      alsa-lib
      at-spi2-core
      attr
      bzip2
      curl
      dbus
      expat
      glib
      libsodium
      libssh
      libxml2
      nspr
      nss
      openssl
      pango
      stdenv.cc
      systemd
      util-linux
      vulkan-loader
      xz
      zlib
      zstd
    ];
  };

  # Enable flatpaks
  services.flatpak.enable = true;

  # Enable the OpenSSH daemon and other remote tools.
  services.openssh.enable = true;
  programs.mosh.enable = true;

  # Add custom services
  systemd.services.pueued = {
    enable = true;
    description = "Pueue Daemon - CLI process scheduler and manager";
    wantedBy = ["default.target"];
    serviceConfig = {
      Restart = "no";
      ExecStart = "${pkgs.pueue.outPath}/bin/pueued -vv";
    };
  };

  # Enable GPG signing
  services.gnome.gnome-keyring.enable = true;
  programs.seahorse.enable = true; # enable the graphical frontend
  security.pam.services.gdm.enableGnomeKeyring = true; # load gnome-keyring at startup
  services.pcscd.enable = true;
  programs.gnupg.agent = {
    enable = true;
    pinentryPackage = pkgs.pinentry-gnome3;
    enableSSHSupport = true;
  };

  virtualisation = {
    containers.enable = true;

    podman = {
      enable = true;
      # Create a `docker` alias for podman, to use it as a drop-in replacement
      dockerCompat = true;
      dockerSocket.enable = true;
      # Required for containers under podman-compose to be able to talk to each other.
      defaultNetwork.settings.dns_enabled = true;
    };

    libvirtd.enable = true;
  };
  programs.virt-manager.enable = true;

  system.stateVersion = "23.11"; # Did you read the comment?
  system.autoUpgrade.enable = true;

  # Set user config settings
  users.defaultUserShell = pkgs.nushell;
}