{ darwin, fetchurl, lib, ocamlPackages, stdenv }:

let
  pname = "alt-ergo";
  version = "2.6.0";

  src = fetchurl {
    url = "https://github.com/OCamlPro/alt-ergo/releases/download/v${version}/alt-ergo-${version}.tbz";
    hash = "sha256-EmkxGvJSeKRmiSuoeMyIi6WfF39T3QPxKixiOwP8834=";
  };
in

let alt-ergo-lib = ocamlPackages.buildDunePackage rec {
  pname = "alt-ergo-lib";
  inherit version src;
  buildInputs = with ocamlPackages; [ ppx_blob ];
  propagatedBuildInputs = with ocamlPackages; [
    camlzip
    dolmen_loop
    dune-build-info
    fmt
    ocplib-simplex
    ppx_deriving
    seq
    stdlib-shims
    zarith
  ];
}; in

let alt-ergo-parsers = ocamlPackages.buildDunePackage rec {
  pname = "alt-ergo-parsers";
  inherit version src;
  nativeBuildInputs = [ ocamlPackages.menhir ];
  propagatedBuildInputs = [ alt-ergo-lib ] ++ (with ocamlPackages; [ psmt2-frontend ]);
}; in

ocamlPackages.buildDunePackage {

  inherit pname version src;

  nativeBuildInputs = [ ocamlPackages.menhir ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.sigtool ];
  propagatedBuildInputs = [ alt-ergo-parsers ] ++ (with ocamlPackages; [ cmdliner dune-site ppxlib ]);

  outputs = [ "bin" "out" ];

  installPhase = ''
    runHook preInstall
    dune install --prefix $bin ${pname}
    mkdir -p $out/lib/ocaml/${ocamlPackages.ocaml.version}/site-lib
    mv $bin/lib/alt-ergo $out/lib/ocaml/${ocamlPackages.ocaml.version}/site-lib/
    runHook postInstall
  '';

  meta = {
    description = "High-performance theorem prover and SMT solver";
    homepage    = "https://alt-ergo.ocamlpro.com/";
    license     = lib.licenses.ocamlpro_nc;
    maintainers = [ lib.maintainers.thoughtpolice ];
  };
}
