{ lib
, stdenv
, cmdliner
, fetchurl
, findlib
, ocaml
, ocamlbuild
, topkg
}:

if lib.versionOlder ocaml.version "4.14.0"
then throw "cmarkit is not available for OCaml ${ocaml.version}"
else

stdenv.mkDerivation rec {
  pname = "cmarkit";
  version = "0.2.0";

  src = fetchurl {
    url = "https://erratique.ch/software/cmarkit/releases/cmarkit-${version}.tbz";
    hash = "sha256-86RuGB5pLbw/ThPGz9+qLaZRH7xvxbYrZWFLLIkc5Mk=";
  };

  nativeBuildInputs = [
    ocaml
    findlib
    ocamlbuild
    topkg
  ];

  buildInputs = [
    topkg
    cmdliner
  ];

  strictDeps = true;

  inherit (topkg) buildPhase installPhase;

  meta = with lib; {
    description = "CommonMark parser and renderer for OCaml";
    homepage = "https://erratique.ch/software/cmarkit";
    changelog = "https://github.com/dbuenzli/cmarkit/blob/v${version}/CHANGES.md";
    license = licenses.isc;
    maintainers = [ maintainers.marsam ];
    inherit (ocaml.meta) platforms;
  };
}