{ stdenv, fetchFromGitHub, ocaml, jbuilder, findlib, defaultVersion ? "0.11.0" }: { name, version ? defaultVersion, buildInputs ? [], hash, meta, ...}@args: if !stdenv.lib.versionAtLeast ocaml.version "4.04" then throw "${name}-${version} is not available for OCaml ${ocaml.version}" else stdenv.mkDerivation (args // { name = "ocaml${ocaml.version}-${name}-${version}"; inherit version; src = fetchFromGitHub { owner = "janestreet"; repo = name; rev = "v${version}"; sha256 = hash; }; buildInputs = [ ocaml jbuilder findlib ] ++ buildInputs; inherit (jbuilder) installPhase; meta = { license = stdenv.lib.licenses.asl20; inherit (ocaml.meta) platforms; homepage = "https://github.com/janestreet/${name}"; } // meta; })