diff --git a/flake.nix b/flake.nix
index bb6f9b47..9b483aff 100644
--- a/flake.nix
+++ b/flake.nix
@@ -31,7 +31,7 @@
           overlays = [(import rust-overlay)];
         };
 
-      rustToolChain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain;
+      rustToolChain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
       craneLib = (crane.mkLib pkgs).overrideToolchain rustToolChain;
 
         src = craneLib.cleanCargoSource ./.;