{
  stdenv,
  radkfile-src,
  gzip,
  iconv,
  edrdgMetadata,
}:
stdenv.mkDerivation {
  name = "radkfile";

  src = radkfile-src;
  dontUnpack = true;

  nativeBuildInputs = [
    gzip
    iconv
  ];
  buildPhase = ''
    runHook preBuild

    gzip -dkc $src > radkfile
    iconv -f EUC-JP -t UTF-8 -o radkfile_utf8 radkfile

    runHook postBuild
  '';

  installPhase = ''
    runHook preInstall

    install -Dt $out radkfile_utf8

    runHook postInstall
  '';

  meta = edrdgMetadata // {
    description = "A file providing searchable decompositions of kanji characters";
    homepage = "https://www.edrdg.org/krad/kradinf.html";
  };
}