{ hostname, username }:
{
  nix = {
    gc = {
      automatic = true;
      options = "--delete-older-than 30d";
    };
    optimise.automatic = true;
    settings = {
      builders-use-substitutes = true;
      experimental-features = [ "flakes" "nix-command" ];
      substituters = [ "https://nix-community.cachix.org" ];
      trusted-public-keys = [
        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      ];
      trusted-users = [ "@wheel" ];
      warn-dirty = false;
    };
  };

  programs.zsh.enable = true;
  programs.gnupg.agent.enable = true;

  networking.hostName = hostname;

  homebrew = {
    enable = true;
    onActivation.cleanup = "zap";

    brews = [
      "cocoapods"
    ];

    casks = [
      "aerospace"
      "citrix-workspace"
      "caffeine"
      "chatgpt"
      "docker-desktop"
      "dracula-xcode"
      "google-chrome"
      "ghostty"
      "karabiner-elements"
      "logseq"
      "microsoft-outlook"
      "microsoft-teams"
      "nextcloud"
      "nordvpn"
      "parsec"
      "proton-pass"
      "protonvpn"
      "raycast"
      "sf-symbols"
      "slack"
      "zen"
    ];

    taps = [
      "dracula/install"
      "homebrew/services"
      "nikitabobko/tap"
    ];
  };

  services = {
    tailscale.enable = true;
  };

  system = {

    primaryUser = username;

    defaults = {
      dock = {
        autohide = true;
        autohide-time-modifier = 0.1;
        expose-animation-duration = 0.0;
        mru-spaces = false;
        orientation = "right";
        show-recents = false;
        static-only = true;
        tilesize = 32;
        wvous-br-corner = 1;
      };

      finder = {
        AppleShowAllExtensions = true;
        AppleShowAllFiles = true;
        CreateDesktop = false;
        FXPreferredViewStyle = "Nlsv";
        FXRemoveOldTrashItems = true;
        QuitMenuItem = true;
        ShowPathbar = true;
        ShowStatusBar = true;
        _FXShowPosixPathInTitle = true;
      };

      hitoolbox.AppleFnUsageType = "Change Input Source";

      menuExtraClock = {
        IsAnalog = false;
        Show24Hour = true;
        ShowDate = 0;
        ShowDayOfWeek = false;
      };

      NSGlobalDomain = {
        AppleInterfaceStyle = "Dark";
        AppleMeasurementUnits = "Centimeters";
        AppleShowAllExtensions = true;
        AppleShowAllFiles = true;
        AppleTemperatureUnit = "Celsius";
        InitialKeyRepeat = 14;
        KeyRepeat = 1;
        NSWindowShouldDragOnGesture = true;
        "com.apple.mouse.tapBehavior" = 1;
      };

      spaces.spans-displays = true;

      trackpad = {
        Clicking = true;
        TrackpadRightClick = true;
      };

    };

    stateVersion = 6;
  };

  time.timeZone = "Europe/Berlin";
}