{

  inputs = {
    naersk.url = "github:nmattia/naersk/master";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, utils, naersk }:
    rec {
      overlay = final: prev: {
        ha-now-playing = final.callPackage ./.;
      };
    } // utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        naersk-lib = pkgs.callPackage naersk { };
      in
      rec {
        packages.ha-now-playing = naersk-lib.buildPackage {
          pname = "ha-now-playing";
          root = ./.;

          buildInputs = with pkgs;[
            openssl
          ];
          nativeBuildInputs = with pkgs; [
            pkg-config
          ];
        };
        defaultPackage = packages.ha-now-playing;

        apps.ha-now-playing = utils.lib.mkApp {
          drv = self.defaultPackage."${system}";
        };
        defaultApp = apps.ha-now-playing;

        devShell = with pkgs; mkShell {
          buildInputs = [ cargo rustc rustfmt pre-commit rustPackages.clippy ];
          RUST_SRC_PATH = rustPlatform.rustLibSrc;
        };

      });

}