{
  description = "Healthchecks";

  inputs = {
    nixpkgs = {
      url = "nixpkgs/nixos-22.11";
    };
  };

  outputs = { self, nixpkgs }@inputs:
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs {
        inherit system;
        overlays = [
          (
            self: super: {
              # sonarr = super.sonarr.overrideAttrs (
              #   old:
              #   let
              #     version = "3.0.10.1567";
              #     sha256 = "sha256-6zdp/Bg+9pcrElW5neB+BC16Vn1VhTjhMRRIxGrKhxc=";
              #   in
              #   {
              #     inherit version;
              #     src = pkgs.fetchurl {
              #       url = "https://download.sonarr.tv/v3/main/${version}/Sonarr.main.${version}.linux.tar.gz";
              #       sha256 = sha256;
              #     };
              #   }
              # );
            }
          )
        ];
      };

    in
    {
      packages.${system}.smtpd = pkgs.dockerTools.buildLayeredImage
        {
          name = "healthchecks-smtpd";
          tag = "latest";
          maxLayers = 2;
          copyToRoot = pkgs.buildEnv {
            name = "image-root";
            pathsToLink = [ "/" ];
            paths = [
              pkgs.healthchecks
            ];
          };
          config = {
            Cmd = [
              "${pkgs.sonarr}/bin/NzbDrone"
              "-nobrowser"
              "-data=/config"
            ];
            User = "5000:5000";
            ExposedPorts = {
              "8989/tcp" = { };
            };
            Volumes = {
              "/config" = { };
            };
            Env = [
              "LANG=en_US.UTF-8"
              "SSL_CERT_FILE=${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"
            ];
          };
        };
    };
}