diff --git a/machines/ap01/_configuration.nix b/machines/ap01/_configuration.nix
index edb1e16..380b16d 100644
--- a/machines/ap01/_configuration.nix
+++ b/machines/ap01/_configuration.nix
@@ -151,6 +151,11 @@ rec {
   filesystem = dir {
     etc = dir {
       "resolv.conf" = symlink "${config.services.resolvconf}/.outputs/resolv.conf";
+      "nixpkgs.version" = {
+        type = "f";
+        file = "${pkgs.lib.version}";
+        mode = "0444";
+      };
     };
   };