diff --git a/modules/base/nix/default.nix b/modules/base/nix/default.nix
index 6e86abbd..1df62ef8 100644
--- a/modules/base/nix/default.nix
+++ b/modules/base/nix/default.nix
@@ -52,7 +52,7 @@ in
     };
 
     nix = {
-      package = pkgs.nixVersions.unstable;
+      package = pkgs.nixVersions.nix_2_13;
       gc = {
         automatic = true;
         dates = "hourly";
diff --git a/shells/nixos-config.nix b/shells/nixos-config.nix
index 9435e2f3..426b30e1 100644
--- a/shells/nixos-config.nix
+++ b/shells/nixos-config.nix
@@ -17,7 +17,7 @@
   packages = [
     pkgs.agenix
     # Use nixos-rebuild from flake, since it might be patched
-    (pkgs.nixos-rebuild.override { nix = pkgs.nixVersions.unstable; })
+    (pkgs.nixos-rebuild.override { nix = pkgs.nixVersions.nix_2_13; })
     pkgs.nixpkgs-fmt
   ];
 }