{
  config,
  sysLib,
  pkgs,
  ...
}: let
  agent-program = sysLib.writeShellScriptWithLibrary {
    name = "onlykey-gpg-agent";
    src = ./agent-program;
    dependencies = with pkgs; [
      python3
      onlykey-agent
    ];
  };
in {
  programs.gpg = {
    enable = true;
    homedir = "${config.xdg.dataHome}/gnupg/onlykey";
    mutableKeys = true;
    mutableTrust = true;
    settings = {
      # Hardware-based GPG configuration
      agent-program = "${agent-program}/bin/onlykey-gpg-agent";

      default-key = "Soispha <soispha@vhack.eu>";
      # TODO add more
    };
    publicKeys = [
      {
        source = ./keys/sils_at_sils.li;
        trust = "full";
      }
      {
        source = ./keys/soispha_at_vhack.eu;
        trust = "ultimate";
      }
    ];
  };
  services.gpg-agent = {
    enable = false;
    enableZshIntegration = true;
    enableScDaemon = true; # smartcards and such things
    pinentryFlavor = "tty";
  };
}