{ ... }:
{
  config.dendritic.features.security-systemd-user = {
    nixosModules = [
      (
        { ... }:
        {
          systemd.services."user@".serviceConfig = {
            ProtectSystem = "strict";
            ProtectClock = true;
            ProtectHostname = true;
            ProtectKernelTunables = true;
            ProtectKernelModules = true;
            ProtectKernelLogs = true;
            ProtectProc = "invisible";
            PrivateTmp = true;
            PrivateNetwork = true;
            MemoryDenyWriteExecute = true;
            RestrictAddressFamilies = [
              "AF_UNIX"
              "AF_NETLINK"
              "AF_BLUETOOTH"
            ];
            RestrictNamespaces = true;
            RestrictRealtime = true;
            RestrictSUIDSGID = true;
            SystemCallFilter = [
              "~@keyring"
              "~@swap"
              "~@debug"
              "~@module"
              "~@obsolete"
              "~@cpu-emulation"
            ];
            SystemCallArchitectures = "native";
          };
        }
      )
    ];
  };
}