_: {
  perSystem = {pkgs, ...}: {
    # counts how many syllabes in a string.
    # not perfect. Does not handle silents e in french
    # but that's what I use for writing poetry
    packages.custom-syllabes =
      pkgs.writers.writePython3Bin "custom-syllabes" {
        libraries = with pkgs; [
          python3Packages.pyphen
        ];
      } ''
        import sys
        import pyphen

        dic = pyphen.Pyphen(lang="fr")

        text = sys.stdin.read().strip()

        chunks = []
        total = 0

        for w in text.split():
            hyphenated = dic.inserted(w)
            parts = hyphenated.split("-")
            chunks.append("/".join(parts))
            total += len(parts)

        print(f"{total} ({'/'.join(chunks)})")
      '';
  };
}
