{
  inputs = {
    naersk.url = "github:nix-community/naersk/master";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
    utils.url = "github:numtide/flake-utils";

    rust-overlay.url = "github:oxalica/rust-overlay";
  };

  outputs = { self, nixpkgs, utils, naersk, rust-overlay }:
    utils.lib.eachDefaultSystem (system:
      let

        pkgs = import nixpkgs {
          inherit system;
          overlays = [ (import rust-overlay) ];
        };

        toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;

        naersk-lib = pkgs.callPackage naersk {
          cargo = toolchain;
          rustc = toolchain;
        };

        opensslEnv = {
          OPENSSL_STATIC = "1";
          OPENSSL_LIB_DIR = "${pkgs.pkgsStatic.openssl.out}/lib";
          OPENSSL_INCLUDE_DIR = "${pkgs.pkgsStatic.openssl.dev}/include";
        };

      in
      {
        defaultPackage = naersk-lib.buildPackage ({
          src = ./.;
          doCheck = false;
          nativeBuildInputs = [ pkgs.pkgsStatic.stdenv.cc ];
          CARGO_BUILD_TARGET = "x86_64-unknown-linux-musl";
          CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static";
        } // opensslEnv);

        devShell = pkgs.mkShell ({
          nativeBuildInputs = [
            pkgs.stdenv.cc
            pkgs.openssl
            toolchain
          ];
          shellHook = ''
            source $(pwd)/.env.dev
            export CARGO_HOME=$(pwd)/.cargo
          '';
        } // opensslEnv);
      });
}