{ ... }:
{
  nix.settings.trusted-users = [ "builder" ];

  users.users.builder = {
    openssh.authorizedKeys.keys = [
      # 1password
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINBkozy+X96u5ciX766bJ/AyQ3xm1tXZTIr5+4PVFZFi"
      # remote builder ssh key
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGFGxdplt9WwGjdhoYkmPe2opZMJShtpqnGCI+swrgvw"
      # YubiKey 5C Nano (personal)
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIGX4+CuUjiX6Doi4n6RqmznzFUyRrxKhEFvuIxROzXDKAAAABHNzaDo= ssh:"
      # Yubikey 5C (keychain)
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIDnU4Xd8bElZYVWDbknlIgskR/q7ORrbvO0FLnJMQX+eAAAABHNzaDo= ssh:"
      # Yubikey 5C NFC (backup)
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAINLBHE4O9RrTgTa+m0kcWL2Mhpi3C57MpTpip7riTophAAAABHNzaDo= ssh:"
      # Yubikey 5C Nano (work)
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIBVuEgqp/pmfskha3gIaYIfP0JEgKG/vVV3Bswb63wr2AAAABHNzaDo="
      # Yubikey Security Key C NFC (work, backup)
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIGjs8WvWBuiL6hujqSaXLxBIs5unjBex22Whdrj/radmAAAABHNzaDo="
    ];
    isNormalUser = true;
    group = "nogroup";
  };
}