{
  description = "Fudo Backplane Client.";

  inputs = {
    nixpkgs.url = "nixpkgs/nixos-22.05";
    helpers.url = "git+https://git.fudo.org/fudo-public/nix-helpers.git";
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { nixpkgs, helpers, utils, ... }:
    utils.lib.eachDefaultSystem (system:
      let pkgs = nixpkgs.legacyPackages."${system}";
      in {
        packages = rec {
          default = backplaneDnsClient;
          backplaneDnsClient =
            import ./dns-client.nix { inherit pkgs helpers; };
        };

        devShells = rec {
          default = update;
          update = let
            update-deps = pkgs.writeShellApplication {
              name = "update-deps";
              runtimeInputs = with pkgs; [ bundler bundix ];
              text = ''
                bundle lock
                bundix
              '';
            };
          in pkgs.mkShell { buildInputs = with pkgs; [ update-deps ]; };
        };
      });
}