nixpkgs/pkgs/development/tools/ocaml/js_of_ocaml/camlp4.nix

{ buildDunePackage, fetchFromGitHub, js_of_ocaml-compiler
, camlp4, ocsigen_deriving
}:

buildDunePackage rec {
  version = "3.2.1";
  pname = "js_of_ocaml-camlp4";

  useDune2 = false;

  src = fetchFromGitHub {
    owner = "ocsigen";
    repo = "js_of_ocaml";
    rev = version;
    sha256 = "1v2hfq0ra9j07yz6pj6m03hrvgys4vmx0gclchv94yywpb2wc7ik";
  };

  buildInputs = [ camlp4 ocsigen_deriving ];

  meta = builtins.removeAttrs js_of_ocaml-compiler.meta [ "mainProgram" ];
}