diff --git a/flake.nix b/flake.nix
index 2e81b1d..7e79af0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,9 +37,10 @@
             let
               pkgs = import nixpkgs { inherit system; };
               fenix' = (import fenix { inherit system pkgs; });
-              toolchain = fenix'.complete.withComponents (
-                (builtins.fromTOML (builtins.readFile ./rust-toolchain.toml)).toolchain.components
-              );
+              toolchain = fenix'.fromToolchainFile {
+                file = ./rust-toolchain.toml;
+                sha256 = "sha256-opUgs6ckUQCyDxcB9Wy51pqhd0MPGHUVbwRKKPGiwZU=";
+              };
             in
             {
               inherit pkgs toolchain;