{ stdenv, fetchzip, ocaml, findlib, cppo, easy-format, biniou }: let pname = "yojson"; param = if stdenv.lib.versionAtLeast ocaml.version "4.01" then { version = "1.3.3"; sha256 = "02l11facbr6bxrxq95vrcp1dxapp02kv7g4gq8rm62pb3dj5c6g7"; } else { version = "1.2.3"; sha256 = "10dvkndgwanvw4agbjln7kgb1n9s6lii7jw82kwxczl5rd1sgmvl"; }; in stdenv.mkDerivation { name = "ocaml${ocaml.version}-${pname}-${param.version}"; src = fetchzip { url = "https://github.com/mjambon/${pname}/archive/v${param.version}.tar.gz"; inherit (param) sha256; }; buildInputs = [ ocaml findlib ]; propagatedBuildInputs = [ cppo easy-format biniou ]; createFindlibDestdir = true; makeFlags = "PREFIX=$(out)"; preBuild = '' mkdir $out/bin ''; meta = with stdenv.lib; { description = "An optimized parsing and printing library for the JSON format"; homepage = "http://mjambon.com/${pname}.html"; license = licenses.bsd3; maintainers = [ maintainers.vbgl ]; platforms = ocaml.meta.platforms or []; }; }