{ stdenv, fetchurl , ocaml, findlib, pkgconfig, perl , gmp }: let source = if stdenv.lib.versionAtLeast ocaml.version "4.02" then { version = "1.9.1"; url = https://github.com/ocaml/Zarith/archive/release-1.9.1.tar.gz; sha256 = "0pfa271476dic5pvn6kxz3dfswxs6kqm2cxmhdx5xq2ayca05gj9"; } else { version = "1.3"; url = http://forge.ocamlcore.org/frs/download.php/1471/zarith-1.3.tgz; sha256 = "1mx3nxcn5h33qhx4gbg0hgvvydwlwdvdhqcnvfwnmf9jy3b8frll"; }; in stdenv.mkDerivation rec { name = "ocaml${ocaml.version}-zarith-${version}"; inherit (source) version; src = fetchurl { inherit (source) url sha256; }; nativeBuildInputs = [ pkgconfig ]; buildInputs = [ ocaml findlib perl ]; propagatedBuildInputs = [ gmp ]; patchPhase = "patchShebangs ./z_pp.pl"; configurePhase = '' ./configure -installdir $out/lib/ocaml/${ocaml.version}/site-lib ''; preInstall = "mkdir -p $out/lib/ocaml/${ocaml.version}/site-lib/stublibs"; meta = with stdenv.lib; { description = "Fast, arbitrary precision OCaml integers"; homepage = "http://forge.ocamlcore.org/projects/zarith"; license = licenses.lgpl2; inherit (ocaml.meta) platforms; maintainers = with maintainers; [ thoughtpolice vbgl ]; }; }