{ pkgs, ... }:
{
  services.udev.packages = [ pkgs.yubikey-personalization ];

  environment.systemPackages = with pkgs; [ gnupg pinentry pinentry-curses pinentry-gtk2 ]; # paperkey ];

  # Depending on the details of your configuration, this section might be necessary or not;
  # feel free to experiment
  environment.shellInit = ''
    export GPG_TTY="$(tty)"
    gpg-connect-agent /bye
    export SSH_AUTH_SOCK="/run/user/$UID/gnupg/S.gpg-agent.ssh"
  '';

  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
    pinentryFlavor = "gtk2";
  };
}