{ self, ... }:
{
  perSystem =
    { ... }:
    {
      websites.${self.domain} =
        { config, lib, ... }:
        let
          inherit (lib) mkOption types;
          root = ./html;
          files =
            with lib.fileset;
            toList (difference (fileFilter (file: file.hasExt "html") root) ./html/Kalender);
          replacements = {
            "@title@" = config.title;
            "@stylesheet@" = ''<link rel="stylesheet" type="text/css" href="style.css">'';
            "@head@" = ''
              <meta charset="utf-8" />
              <meta http-equiv="X-UA-Compatible" content="IE=edge" />
              <meta name="viewport" content="width=device-width">
              <meta name="description" content="Informationen zum Stadtteil Heimfeld und seinem Stadtteilbeirat">
              <meta name="keywords" content="Heimfeld, Stadtteil, Hamburg, Stadtteilbeirat, Beirat, Stadtteilfest, Treffpunkthaus">
              <link rel="shortcut icon" type="image/x-icon" href="/img/Kraniche-dreh-klein.gif">
              <script async src="redirects.js"></script>
            '';
            "@past-events@" =
              with lib;
              let
                as-list = mapAttrsToList (name: value: {
                  start = value.date.start + value.time.start;
                  value = toString value;
                }) config.events;
                sorted = sortOn (event: event.start) as-list;
              in
              ''
                <dl>
                ${concatMapStringsSep "\n" (event: event.value) sorted}
                </dl>
              '';
          };
          replace = file: with lib; replaceStrings (attrNames replacements) (attrValues replacements) file;
        in
        {
          title = "Stadtteilbeirat Heimfeld";
          events =
            with lib;
            listToAttrs (
              map (file: {
                name = removeSuffix ".nix" (toString (baseNameOf file));
                value = import file;
              }) (fileset.toList ./termine)
            );
          files =
            with lib;
            listToAttrs (
              map (path: {
                name = lib.path.removePrefix root path;
                value = with builtins; toFile (baseNameOf path) (replace (readFile path));
              }) files
            );
        };
    };
}