diff --git a/flake.nix b/flake.nix
index 20b83be..c0927d3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -181,6 +181,7 @@
                 ];
                 registry = {
                   nixpkgs.flake = nixpkgs;
+                  nixpkgs-unstable.flake = nixpkgs-unstable;
                 };
               };
             }