{
  self,
  pkgs,
  lib,
  ...
}:
let
  custom-key-mapping = {
    # AI Instructions
    # I need a mapping that switches my keyboard keys in the following way:
    # the key above TAB and left of number 1 (lets call this key NEWTILDE has a code 30064771172)
    # the key between left shift and Z (lets call this key NEWPIPE has a code 30064771125)
    # the key above right shift and left of the big enter key (lets call this key NEWPLUSMINUS has a code 30064771121)
    #
    # Write the mapping in such a way that:
    # NEWTILDE switches with NEWPIPE
    # NEWPIPE overrides NEWPLUSMINUS
    UserKeyMapping = [
      {
        HIDKeyboardModifierMappingSrc = 30064771125;
        HIDKeyboardModifierMappingDst = 30064771172;
      }
      {
        HIDKeyboardModifierMappingSrc = 30064771172;
        HIDKeyboardModifierMappingDst = 30064771121;
      }
    ];
  };

  hot-corners = {
    Disabled = 1;
    MissionControl = 2;
    ApplicationWindows = 3;
    Desktop = 4;
    StartScreenSaver = 5;
    DisableScreenSaver = 6;
    Dashboard = 7;
    PutDisplayToSleep = 10;
    Launchpad = 11;
    NotificationCenter = 12;
    LockScreen = 13;
    QuickNote = 14;
  };
in
{

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  environment.systemPackages = with pkgs; [
    git
    vim
  ];

  launchd.user.agents = {
    "custom-key-mapping" = {
      script = ''
        /usr/bin/hidutil property --set '${builtins.toJSON custom-key-mapping}' > /dev/null
      '';
      serviceConfig = {
        RunAtLoad = true;
      };
    };
  };

  # The platform the configuration will be used on.
  nixpkgs.hostPlatform = "aarch64-darwin";

  # Set Git commit hash for darwin-version.
  system.configurationRevision = self.rev or self.dirtyRev or null;

  # Used for backwards compatibility, please read the changelog before changing.
  # $ darwin-rebuild changelog
  system.stateVersion = 5;

  system.defaults = {
    dock = {
      autohide = true;
      autohide-delay = 0.0;
      autohide-time-modifier = 0.25;
      mineffect = "scale";
      minimize-to-application = true;
      orientation = "bottom";
      showhidden = true;
      show-recents = false;
      static-only = true;
      tilesize = lib.mkDefault 80;

      # Hot corners
      wvous-bl-corner = hot-corners.MissionControl;
      wvous-br-corner = hot-corners.Launchpad;
      wvous-tl-corner = hot-corners.QuickNote;
    };

    finder = {
      _FXShowPosixPathInTitle = true; # show full path in finder title
      AppleShowAllExtensions = true; # show all file extensions
      FXEnableExtensionChangeWarning = false; # disable warning when changing file extension
      QuitMenuItem = true; # enable quit menu item
      ShowPathbar = true; # show path bar
      ShowStatusBar = true; # show status bar
    };

    NSGlobalDomain = {
      AppleShowScrollBars = "WhenScrolling";
      AppleScrollerPagingBehavior = true;
    };
  };

  # Auto upgrade nix package and the daemon service.
  services.nix-daemon.enable = true;

  nix = {
    configureBuildUsers = true;
    distributedBuilds = true;

    gc = {
      automatic = true;
      options = "--delete-older-than 7d";
    };
    settings = {
      experimental-features = "nix-command flakes";
    };
  };

  homebrew = {
    enable = true;
    onActivation = {
      autoUpdate = true;
      # 'zap': uninstalls all formulae(and related files) not listed here.
      cleanup = "zap";
      upgrade = true;
    };
  };
}