{
  kubelib,
  pkgs,
}: {
  remoteYAMLFile = {
    version,
    url,
    hash,
  }:
    pkgs.stdenv.mkDerivation {
      pname = url;
      inherit version;

      src = pkgs.fetchurl {inherit url hash;};

      phases = ["installPhase"];
      installPhase = "cp -v $src $out";
    };

  helmChart = kubelib.downloadHelmChart;

  gitChart = {
    name,
    version,
    url,
    hash,
    chartPath,
    vPrefixInRef ? false,
  }:
    pkgs.stdenv.mkDerivation {
      pname = "${url}-${chartPath}";
      inherit version;

      src = pkgs.fetchgit {
        inherit url hash;
        rev =
          if vPrefixInRef
          then "v${version}"
          else version;
        sparseCheckout = [chartPath];
      };

      phases = ["installPhase"];
      installPhase = "cp -rv $src/${chartPath} $out";
    };
}