depot/third_party/nixpkgs/pkgs/development/ocaml-modules/dum/default.nix

{
  lib,
  stdenv,
  fetchFromGitHub,
  ocaml,
  findlib,
  easy-format,
}:

stdenv.mkDerivation rec {
  pname = "ocaml${ocaml.version}-dum";
  version = "1.0.1";

  src = fetchFromGitHub {
    owner = "mjambon";
    repo = "dum";
    rev = "v${version}";
    sha256 = "0yrxl97szjc0s2ghngs346x3y0xszx2chidgzxk93frjjpsr1mlr";
  };

  postPatch = ''
    substituteInPlace "dum.ml" \
    --replace "Lazy.lazy_is_val" "Lazy.is_val" \
    --replace "Obj.final_tag" "Obj.custom_tag"
  '';

  nativeBuildInputs = [
    ocaml
    findlib
  ];
  propagatedBuildInputs = [ easy-format ];

  strictDeps = true;

  createFindlibDestdir = true;

  meta = with lib; {
    homepage = "https://github.com/mjambon/dum";
    description = "Inspect the runtime representation of arbitrary OCaml values";
    license = licenses.lgpl21Plus;
    maintainers = [ maintainers.alexfmpe ];
  };
}