diff --git a/flake.nix b/flake.nix
index f77d912..4f3c492 100644
--- a/flake.nix
+++ b/flake.nix
@@ -74,6 +74,7 @@
             ];
             registry = {
               nixpkgs.flake = inputs.nixpkgs;
+              unstable.flake = inputs.nixpkgs-unstable-small;
             };
           };
         };