diff --git a/system/nix-config.nix b/system/nix-config.nix
index 5345ecb..cc69256 100644
--- a/system/nix-config.nix
+++ b/system/nix-config.nix
@@ -1,5 +1,6 @@
-{ pkgs, ... }:
+{ pkgs, xinlib, ... }:
 let
+  inherit (xinlib) todo;
   nixOptions = {
     gc = {
       automatic = true;
@@ -8,7 +9,7 @@ let
     };
 
     # Enable flakes
-    package = pkgs.nixUnstable;
+    package = todo "nix 2.18 has a regress: https://github.com/NixOS/nix/issues/9052" pkgs.nixVersions.nix_2_17;
     extraOptions = ''
       experimental-features = nix-command flakes
     '';