nix-config/modules/darwin/programs/ssh/default.nix

{ ... }:
{
  config = {
    programs.ssh.knownHosts = {
      desktop = {
        publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPTBMydhOc6SnOdB5WrEd7X07DrboAtagCUgXiOJjLov matt@matt-nixos";
      };
      nas = {
        publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIwoHWOLSTGVif9hAhaMLl0qDA4roIzCNuyR6kyIXDOj admin@jallen-nas";
      };
    };
  };
}