diff --git a/modules/system.nix b/modules/system.nix
index df347591..d552d932 100644
--- a/modules/system.nix
+++ b/modules/system.nix
@@ -109,7 +109,7 @@ in
     };
 
     nix = {
-      package = pkgs.nixVersions.latest;
+      package = pkgs.nixVersions.nix_2_22;
 
       settings = {
         auto-optimise-store = true;