diff --git a/system/flakes/tanker.nix b/system/flakes/tanker.nix
index 544acfb..4b07b5f 100644
--- a/system/flakes/tanker.nix
+++ b/system/flakes/tanker.nix
@@ -4,11 +4,13 @@ let
   default-system = "x86_64-linux";
 
   # overlay-master = _: _: { pkgs-master = import inputs.nixpkgs-master { system = default-system; }; };
+  # overlay-unstable = _: _: { pkgs-unstable = import inputs.nixpkgs { system = default-system; }; };
   overlay-nifoc = inputs.nifoc-overlay.overlay;
 
   nixpkgsConfig = {
     overlays = [
       # overlay-master
+      # overlay-unstable
       overlay-nifoc
     ];