{ config, pkgs, ... }: with import <stockholm/lib>; let
  peers = mapAttrs (n: v: { id = v.syncthing.id; }) (filterAttrs (n: v: v.syncthing.id != null) config.krebs.hosts);
in {
  services.syncthing = {
    enable = true;
    group = "syncthing";
    configDir = "/var/lib/syncthing";
  };
  krebs.iptables.tables.filter.INPUT.rules = [
    { predicate = "-p tcp --dport 22000"; target = "ACCEPT";}
    { predicate = "-p udp --dport 21027"; target = "ACCEPT";}
  ];
  krebs.syncthing = {
    enable = true;
    cert = toString <secrets/syncthing.cert>;
    key = toString <secrets/syncthing.key>;
    peers = peers;
    folders."/home/lass/sync".peers = attrNames peers;
  };

  system.activationScripts.syncthing-home = ''
    ${pkgs.coreutils}/bin/chmod a+x /home/lass
  '';

  krebs.permown."/home/lass/sync" = {
    owner = "lass";
    group = "syncthing";
    umask = "0007";
  };
}