fix: Enable experimental features

api/api-module.nix

@@ -53,6 +53,7 @@ in
         pkgs.gitMinimal
         config.nix.package.out
         pkgs.nixos-rebuild
+        pkgs.nix
         pkgs.restic
         pkgs.mkpasswd
         pkgs.util-linux

configuration.nix

@@ -1,6 +1,6 @@
 { config, pkgs, lib, ... }:
 let
-  url-overlay = "https://git.selfprivacy.org/SelfPrivacy/selfprivacy-nix-repo/archive/22-11.tar.gz";
+  url-overlay = "https://git.selfprivacy.org/SelfPrivacy/selfprivacy-nix-repo/archive/test-migration.tar.gz";
   nix-overlay = (import (builtins.fetchTarball url-overlay));
 in
 {
@@ -96,6 +96,9 @@ in
       automatic = true;
       options = "--delete-older-than 7d";
     };
+    extraOptions = ''
+      experimental-features = nix-command flakes repl-flake
+    '';
   };
   services.journald.extraConfig = "SystemMaxUse=500M";
   boot.kernel.sysctl = {