{
  description = "nixcp flake";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    crane.url = "github:ipetkov/crane";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs@{ nixpkgs, flake-utils, crane, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [
            (import inputs.rust-overlay)
          ];
        };
        toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
        craneLib = (crane.mkLib pkgs).overrideToolchain(_: toolchain);
      in
      {
        devShells.default = pkgs.mkShell {
          nativeBuildInputs = with pkgs; [
            pkg-config
          ];
          buildInputs = with pkgs; [
            openssl
            toolchain
          ];
        };

        packages.default = craneLib.buildPackage {
          src = craneLib.cleanCargoSource ./.;
          strictDeps = true;
          nativeBuildInputs = with pkgs; [
            pkg-config
          ];
          buildInputs = with pkgs; [
            openssl
          ];
        };
      }
    );
}