# In your configuration.nix
{ config, pkgs, ... }:
{
  programs.steam = {
    enable = true;
    # Open ports in the firewall for Steam Remote Play
    remotePlay.openFirewall = true;
    # Open ports in the firewall for Source Dedicated Server
    dedicatedServer.openFirewall = true;
    # Open ports in the firewall for Steam Local Network Game Transfers
    localNetworkGameTransfers.openFirewall = true;
  };
}