{ version, src, stdenv, fetchurl, ocaml, findlib, ocamlbuild }:

stdenv.mkDerivation {
  name = "menhir-${version}";

  inherit src;

  buildInputs = [ ocaml findlib ocamlbuild ];

  createFindlibDestdir = true;

  preBuild = ''
    # fix makefiles.
    RM=$(type -p rm)
    CHMOD=$(type -p chmod)
    for f in src/Makefile demos/OMakefile* demos/Makefile*
    do
      substituteInPlace $f \
        --replace /bin/rm $RM \
        --replace /bin/chmod $CHMOD
    done

    export PREFIX=$out
  '';

  meta = with stdenv.lib; {
    homepage = http://pauillac.inria.fr/~fpottier/menhir/;
    description = "A LR(1) parser generator for OCaml";
    longDescription = ''
      Menhir is a LR(1) parser generator for the Objective Caml programming
      language.  That is, Menhir compiles LR(1) grammar specifications down
      to OCaml code.  Menhir was designed and implemented by François Pottier
      and Yann Régis-Gianas.
    '';
    license = with licenses; [
      (if versionAtLeast version "20170418" then gpl2 else qpl) /* generator */
      lgpl2 /* library */
    ];
    platforms = ocaml.meta.platforms or [];
    maintainers = with maintainers; [ z77z ];
  };
}