{
  description = "A very basic flake";

  inputs = {
    flake-utils = {
      url = "github:numtide/flake-utils";
    };
    crane.url = "github:ipetkov/crane";
    fenix = {
      url = "github:nix-community/fenix";
        inputs.nixpkgs.follows = "nixpkgs";
    };
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
  };

  outputs = inputs:
    with inputs;
    flake-utils.lib.eachDefaultSystem (
      system: let
        pkgs = import nixpkgs {
          inherit system;
        };
        rustPkgs = (crane.mkLib pkgs).overrideToolchain
          fenix.packages.${system}.beta.toolchain;
      in {
        packages = {
          default = rustPkgs.buildPackage {
            src = rustPkgs.cleanCargoSource ./.;
          };
        };
      });
}