{ ... }:
{

  fileSystems = {
    "/export/roms" = {
      device = "/mnt/data/willifan";
      options = [ "bind" ];
    };
  };

  services.nfs.server = {
    enable = true;
    exports = ''
      /export *(rw,fsid=0,no_subtree_check)
      /export/roms *(rw,nohide,insecure,no_subtree_check) 
    '';
  };

  networking.firewall.allowedTCPPorts = [ 2049 ];

}