Dedicated Satisfactory 5 Server on NixOS

satisfactory.nix

{config, pkgs, lib, ...}: {
  users.users.satisfactory = {
    home = "/var/lib/satisfactory";
    createHome = true;
  };

  nixpkgs.config.allowUnfree = true;

  systemd.services.satisfactory = {
    wantedBy = [ "multi-user.target" ];
    preStart = ''
      ${pkgs.steamcmd}/bin/steamcmd \
        +login anonymous \
        +force_install_dir /var/lib/satisfactory/SatisfactoryDedicatedServer \
        +app_update 1690800 validate \
        +quit
    '';
    script = ''
      ${pkgs.glibc}/lib/ld-linux-x86-64.so.2 /var/lib/satisfactory/SatisfactoryDedicatedServer/Engine/Binaries/Linux/UE4Server-Linux-Shipping FactoryGame
    '';
    serviceConfig = {
      Nice = "-5";
      Restart = "always";
      User = "satisfactory";
      WorkingDirectory = "/var/lib/satisfactory";
    };
    environment = {
      LD_LIBRARY_PATH="SatisfactoryDedicatedServer/linux64:SatisfactoryDedicatedServer/Engine/Binaries/Linux:SatisfactoryDedicatedServer/Engine/Binaries/ThirdParty/PhysX3/Linux/x86_64-unknown-linux-gnu/";
    };
  };
}

Hey, thanks for posting this. I have updated it a bit:

• added the isSystemUser and add a group so that nixos rebuild does not complain on nixos-unstable
• open default ports
• add patchelf to set interpreter instead of running server with linker, this fixes the issue with server executable looking for files in wrong paths

https://github.com/matejc/helper_scripts/blob/master/nixes/satisfactory.nix