{ config, lib, pkgs, ... }:
{
  microvm.vms.valheim  = {
    autoStart = true;
    memorySize = 4096;
    vcpu = 2;

    forwardPorts = [
      { from = "host"; hostPort = 2456; guestPort = 2456; proto = "udp"; }
      { from = "host"; hostPort = 2457; guestPort = 2457; proto = "udp"; }
    ];

    # NOTE: For games with large save files, choose a path in "/tank" for
    # storage.
    sharedDirectories = [
      {
        hostPath = "/srv/game-data-valheim";
        guestPath = "/data";
        tag = "valheim-data";
        readOnly = false;
      }
    ];

    packages = [ pkgs.steamcmd pkgs.steam-run ];

    users.users.valheim = {
      isNormalUser = true;
      home = "/home/valheim";
      extraGroups = [ "wheel" ];
    };

    systemd.services.valheim = {
      description = "Valheim Dedicated Server";
      wantedBy = [ "multi-user.target" ];
      serviceConfig = {
        workingDirectory = "/data";
        ExecStart = ''
          ${pkgs.steam-run}/bin/steam-run ./valheim_server.x86_64 \
            -name "Valheim NixOS" \
            -port 2456 \
            -world "FlatEarth" \
            -password "secret" \
            -public 1
        '';
        Restart = "always";
        User = "valheim";
      };
    };
  };
}