ocamlPackages.odoc: use Dune 3

    sha256 = "sha256-9XTb0ozQ/DorlVJcS7ld320fZAi7T+EhV/pTeIT5h/0=";

  };

  # dune 3 is required for tests to pass

  duneVersion = if doCheck then "3" else "2";

  duneVersion = "3";

  nativeBuildInputs = [ cppo ];

  buildInputs = [ astring cmdliner fpath result tyxml odoc-parser fmt ];