{
  hostname = "nixos";
  username = "biscuit";
  timezone = "America/Chicago";

  vpn = {
    vpnEnable = true;
    vpnSecretFile = "/home/biscuit/Wireguard/secret";
  };

  terminal = {
    termFont = "JetBrainsMono Nerd Font"; # e.g., JetBrainsMono Nerd Font
    termShell = "fish";
    shellAliases = {
      update = ''
        if [[ $(uname) == "Darwin" ]]; then
          sudo darwin-rebuild switch --flake ~/.config/nixos#macos
        else
          sudo nixos-rebuild switch --flake ~/.config/nixos#desktop && home-manager switch --flake ~/.config/nixos#desktop
        fi
      '';
      agu = "pkill gjs & ags run ~/.config/nixos/pkgs/ags/biscuit/app.ts & disown (jobs -p) &";
    };
  };

  allowUnfree = true; # allows installation of commercial apps.
  touchpadSupport = false;

  # Custom Applications
  linux-apps = pkgs:
    with pkgs; [
      delfin
    ];

  sshExtraConfig = ''
    Host macair
      User biscuit
      HostName 192.168.68.81
  '';

  # BUILD (optional), you can remove these blocks.
  builder = {
    trustedUsers = [
      "@groups"
      "biscuit"
    ];
    buildMachines = [
      {
        hostName = "192.168.68.81";
        sshUser = "biscuit";
        sshKey = "/home/biscuit/.ssh/id_rsa.pub";
        system = "x86_64-linux";
        supportedFeatures = ["big-parallel" "kvm" "nixos-test"];
      }
    ];
  };
}