nix-config/users/modules/gpg.nix

{pkgs, ...}: {
  programs.gpg = {
    enable = true;
    mutableKeys = true;
    mutableTrust = true;
  };
  services.gpg-agent = {
    enable = true;
    enableSshSupport = true;
    pinentry.package = pkgs.pinentry-emacs;
  };
}