diff --git a/bert/services/factorio.nix b/bert/services/factorio.nix
index 10e0b27..e49103d 100644
--- a/bert/services/factorio.nix
+++ b/bert/services/factorio.nix
@@ -1,14 +1,12 @@
-{
-  # nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
-  #   "factorio-headless"
-  # ];
-  services.factorio = let
-    factorio-nixpkgs = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/7e35ac30ea1d236419653182559367ecd8a30675.tar.gz") {
-      config.allowUnfree = true;
-    };
-  in {
+{pkgs, lib, ...}: {
+  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
+    "factorio-headless"
+  ];
+  services.factorio = {
     enable = true;
-    package = factorio-nixpkgs.factorio-headless;
+    package = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/2c7baaaae909d8d7a50fc33beb593cde9d40e2ce.tar.gz") {
+      config.allowUnfree = true;
+    }).factorio-headless;
     openFirewall = true;
     nonBlockingSaving = true;
     game-name = "Chandler's Factorio Server";