{
  config,
  pkgs,
  ...
}:

let
  user = "olaf";
in

{

  security = {
    pam = {
      services = {
        sudo_local = {
          touchIdAuth = true;
        };
      };
    };
  };

  imports = [

    ../../modules/darwin/home-manager.nix
    ../../modules/shared
  ];

  # Setup user, packages, programs
  nix = {
    package = pkgs.nix;

    settings = {
      trusted-users = [
        "@admin"
        "${user}"
      ];
      substituters = [
        "https://nix-community.cachix.org"
        "https://cache.nixos.org"
      ];
      trusted-public-keys = [ "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" ];
    };

    gc = {
      automatic = true;
      interval = {
        Weekday = 0;
        Hour = 2;
        Minute = 0;
      };
      options = "--delete-older-than 30d";
    };

    extraOptions = ''
      experimental-features = nix-command flakes
    '';
  };

  # Turn off NIX_PATH warnings now that we're using flakes
  system.checks.verifyNixPath = false;

  # Load configuration that is shared across systems
  environment.systemPackages =
    with pkgs;
    [
      emacs-unstable
    ]
    ++ (import ../../modules/shared/packages.nix { inherit pkgs; })

  ;

  launchd.user.agents.emacs.path = [ config.environment.systemPath ];
  launchd.user.agents.emacs.serviceConfig = {
    KeepAlive = true;
    ProgramArguments = [
      "/bin/sh"
      "-c"
      "/bin/wait4path ${pkgs.emacs}/bin/emacs && exec ${pkgs.emacs}/bin/emacs --fg-daemon"
    ];
    StandardErrorPath = "/tmp/emacs.err.log";
    StandardOutPath = "/tmp/emacs.out.log";
  };

  system = {
    stateVersion = 4;

    defaults = {
      NSGlobalDomain = {
        AppleShowAllExtensions = true;
        ApplePressAndHoldEnabled = false;

        # 120, 90, 60, 30, 12, 6, 2
        KeyRepeat = 2;

        # 120, 94, 68, 35, 25, 15
        InitialKeyRepeat = 15;

        "com.apple.mouse.tapBehavior" = 1;
        "com.apple.sound.beep.volume" = 0.0;
        "com.apple.sound.beep.feedback" = 0;
      };

      dock = {
        autohide = false;
        show-recents = false;
        launchanim = true;
        orientation = "bottom";
        tilesize = 48;
      };

      finder = {
        _FXShowPosixPathInTitle = false;
      };

      trackpad = {
        Clicking = true;
        TrackpadThreeFingerDrag = true;
      };
    };

    patches = [
      (pkgs.writeText "auto_master.patch" ''
        -- /etc/auto_master
        +++ /etc/auto_master
        @@ -6,3 +6,5 @@
         /home			auto_home	-nobrowse,hidefromfinder
         /Network/Servers	-fstab
         /-			-static
        +/System/Volumes/Data/Users/olaf/NAS 	auto_nfs_smb	-nosuid,noowners
        +
      '')
    ];

  };
}