Factorio
Factorio is a video game created by Wube Software. Factorio has a multiplayer mode that requires a dedicated server, which is available on Nixpkgs and can be installed on NixOS.
Installation
To install the Factorio server, add the following to your NixOS configuration:
configuration.nix
{
environment.systemPackages = [ pkgs.factorio-headless ];
nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
"factorio-headless"
];
}
 |
Tip
In order to affect your NixOS system by your nix-language-specific changes you must first evaluate it:
$ nixos-rebuild switch --use-remote-sudo |
It is important to only install factorio-headless instead of factorio because the headless version is a redistributable download that does not require login credentials.
Configuration
Here is a minimum viable configuration for the Factorio server:
configuration.nix
{
services.factorio = {
enable = true;
openFirewall = true;
};
}
This will run a unprotected server that binds to the 0.0.0.0 local IP address and uses the default UDP port of 34197, with an auto-generated save file. Factorio servers support IPv6 by setting bind = "[::]";. All default settings can be seen here: services.factorio.*
Mods
The NixOS module for Factorio supports third-party modifications, or mods, which are just zip files with extra game content. While technically you can create a full derivation for mods, in practice this can get complicated, especially since authentication is required to download mods from the official mod site.
Instead, you can download the mods you need separately from https://mods.factorio.com/, place them in a folder such as /home/username/factorio-mods, and put this code in your NixOS configuration. (credit to nicball):
configuration.nix
{
services.factorio.mods =
let
inherit (pkgs) lib;
modDir = /home/username/factorio-mods;
modList = lib.pipe modDir [
builtins.readDir
(lib.filterAttrs (k: v: v == "regular"))
(lib.mapAttrsToList (k: v: k))
(builtins.filter (lib.hasSuffix ".zip"))
];
modToDrv = modFileName:
pkgs.runCommand "copy-factorio-mods" {} ''
mkdir $out
cp ${modDir + "/${modFileName}"} $out/${modFileName}
''
// { deps = []; };
in
builtins.map modToDrv modList;
}