diff --git a/flake.nix b/flake.nix
index 5af3c4a..edacaf2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,7 +34,7 @@
       };
     }) // {
       overlays.default = final: prev: let
-        toolchain = final.rust-bin.stable.latest.default;
+        toolchain = prev.rust-bin.stable.latest.default;
         rustPlatform = final.makeRustPlatform {
           cargo = toolchain;
           rustc = toolchain;