diff --git a/nix/os/snippets/nix-settings.nix b/nix/os/snippets/nix-settings.nix
index d0e616b..4b7104e 100644
--- a/nix/os/snippets/nix-settings.nix
+++ b/nix/os/snippets/nix-settings.nix
@@ -18,6 +18,7 @@ in {
   nix.settings.experimental-features = [
     "nix-command"
     "flakes"
+    "ca-derivations"
   ];
 
   nix.settings.system-features = [
@@ -27,7 +28,12 @@ in {
     "nixos-test"
   ];
 
-  nix.registry.nixpkgs.flake = nodeFlake.inputs.nixpkgs;
+  # nix.registry.nixpkgs.flake = nodeFlake.inputs.nixpkgs;
+  nix.registry.nixpkgs.to = {
+    type = "path";
+    path = nodeFlake.inputs.nixpkgs.outPath;
+    narHash = nodeFlake.inputs.nixpkgs.narHash;
+  };
 
   nix.package = pkgsUnstable.nixVersions.latest;
 }