{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };

  outputs = { nixpkgs, rust-overlay, ... }:
    let
      system = "x86_64-linux";

      pkgs = import nixpkgs {
        inherit system;

        overlays = [ rust-overlay.overlays.default ];
      };

      rust-toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
    in
    {
      devShells.${system}.default = pkgs.mkShell {
        packages = [ rust-toolchain ];
      };
    };
}