diff --git a/overlays.nix b/overlays.nix
index bf0588c..bd232b0 100644
--- a/overlays.nix
+++ b/overlays.nix
@@ -20,4 +20,8 @@
     ];
     recipemd = prev.python3Packages.toPythonApplication final.python3Packages.recipemd;
   };
+
+  insecure = final: prev: {
+    hydra_unstable = prev.hydra_unstable.override { nix = final.nixVersions.unstable; };
+  };
 }