diff --git a/config/nix.nix b/config/nix.nix
index 058747e..15c0590 100644
--- a/config/nix.nix
+++ b/config/nix.nix
@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ pkgs, config, lib, ... }:
 
 let
   cfg = config.machine;
@@ -8,8 +8,11 @@ in {
     buildCores = 1;
     autoOptimiseStore = true;
     useSandbox = true;
+    package = pkgs.nix_2_4;
+    allowedUsers = [ "root" ] ++ (map (n: n.name) cfg.administrators);
     extraOptions = ''
       build-timeout = 86400  # 24 hours
+      experimental-features = nix-command flakes
     '';
     binaryCachePublicKeys = [ (lib.fileContents "${cfg.secretPath}/hydra_cache.pub") ];
     trustedBinaryCaches = [