let
  v."8.0.0.0" = {
    hash = "sha256-5YUX+w4n3nBhAkdgjF9D5yY/jzRKxpW+mTQCBluzsVI=";
    rev = "v8";
  };
  current =
    lib:
    lib.lists.fold (acc: v: if lib.strings.versionOlder acc v then v else acc) "0.0.0" (
      builtins.attrNames v
    );
in
{
  lib,
  version ? current lib,
  hash ? v.${version}.hash,
  rev ? v.${version}.rev or "v${version}",
  ...
}:
{
  inherit version hash rev;
}