{ stdenv, fetchFromGitHub, ocaml, findlib }: let param = { "4.02.3" = { version = "5.0+4.02.0"; sha256 = "16drjk0qafjls8blng69qiv35a84wlafpk16grrg2i3x19p8dlj8"; }; "4.03.0" = { version = "5.0+4.03.0"; sha256 = "061v1fl5z7z3ywi4ppryrlcywnvnqbsw83ppq72qmkc7ma4603jg"; }; }."${ocaml.version}"; in stdenv.mkDerivation { name = "ocaml${ocaml.version}-ppx_tools-${param.version}"; src = fetchFromGitHub { owner = "alainfrisch"; repo = "ppx_tools"; rev = param.version; inherit (param) sha256; }; buildInputs = [ ocaml findlib ]; createFindlibDestdir = true; meta = with stdenv.lib; { description = "Tools for authors of ppx rewriters"; homepage = http://www.lexifi.com/ppx_tools; license = licenses.mit; platforms = ocaml.meta.platforms or []; maintainers = with maintainers; [ vbgl ]; }; }