diff --git a/flake.nix b/flake.nix
index 2bb1c53..586e2fc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,6 +8,10 @@
 
   outputs = { self, nixpkgs, rust-overlay }:
     let
+      rustPkgs = import nixpkgs {
+        inherit (final) system;
+        overlays = [ rust-overlay.overlays.default ];
+      };
       systems = [ "x86_64-linux" "i686-linux" "aarch64-linux" ];
       forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
       nixpkgsFor = forAllSystems (system:
@@ -18,13 +22,7 @@
       );
     in
     {
-      overlay = final: prev:
-        let
-          # Extend final privately with rust-overlay to get rust-bin for the WASM
-          # toolchain without exposing rust-overlay attributes to consumers.
-          rustPkgs = final.extend rust-overlay.overlays.default;
-        in
-        {
+      overlay = final: prev: {
 
         trictrac-front =
           let