{ stdenv, fetchurl, ocaml, findlib, ocamlbuild , version ? if stdenv.lib.versionAtLeast (stdenv.lib.getVersion ocaml) "4.02" then "20170101" else "20140422" }@args: let sha256 = if version == "20140422" then "1ki1f2id6a14h9xpv2k8yb6px7dyw8cvwh39csyzj4qpzx7wia0d" else if version == "20170101" then "0ika46i9gn3sjvspa62fb5dnr20k783vg5fj30649q0ialv6yscr" else throw ("menhir: unknown version " ++ version); in import ./generic.nix (args // { inherit version sha256; })