{
  description = "A Nix-flake-based Rust development environment";

  inputs = {
    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*"; # unstable
    fenix = {
      url = "https://flakehub.com/f/nix-community/fenix/0.1.*";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, fenix, ... }@inputs:
    let
      supportedSystems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];

      forEachSupportedSystem = f:
        nixpkgs.lib.genAttrs supportedSystems (system:
          f {
            pkgs = import nixpkgs {
              inherit system;
              overlays = [ self.overlays.default ];
            };
            inherit system;
          }
        );

    in
    {
      overlays.default = final: prev: {
        rustToolchain =
          with fenix.packages.${prev.stdenv.hostPlatform.system};
          combine (
            with stable;
            [
              clippy
              rustc
              cargo
              rustfmt
              rust-src
            ]
          );
      };

      packages = forEachSupportedSystem ({ pkgs, system }:
        {
          default = pkgs.rustPlatform.buildRustPackage {
            pname = "my-rust-project";     # change if needed
            version = "0.1.0";             # change if needed

            src = pkgs.lib.cleanSource ./.;

            cargoLock = {
              lockFile = ./Cargo.lock;
            };

            nativeBuildInputs = with pkgs; [ pkg-config ];
            buildInputs = with pkgs; [ openssl ];

            meta = with pkgs.lib; {
              description = "My Rust project";
              license = licenses.mit;
              mainProgram = "whereAmI";
            };
          };
        });

      apps = forEachSupportedSystem ({ pkgs, system }:
        {
          default = {
            type = "app";
            program = "${self.packages.${system}.default}/bin/whereAmI";
          };
        });

      devShells = forEachSupportedSystem ({ pkgs, system }:
        {
          default = pkgs.mkShell {
            packages = with pkgs; [
              rustToolchain
              openssl
              pkg-config
              cargo-deny
              cargo-edit
              cargo-watch
              rust-analyzer
            ];

            env = {
              RUST_SRC_PATH = "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
            };
          };
        });
    };
}