let
  keys = [
    # /root/.ssh/id_ed25519.pub
    "ssh-ed25519 AAA...cxy1w"

    # /etc/ssh/ssh_host_ed25519_key.pub    
    "ssh-ed25519 AAA...KafTS"

    # personal key
    "ssh-rsa AAA...DzBA9Qw=="
  ];
in
{
  "example.age".publicKeys = keys;
}