{stdenv, fetchurl, cmake, parallel ? true }: stdenv.mkDerivation rec { name = "stxxl-1.4.1"; src = fetchurl { url = "https://github.com/stxxl/stxxl/archive/1.4.1.tar.gz"; sha256 = "54006a5fccd1435abc2f3ec201997a4d7dacddb984d2717f62191798e5372f6c"; }; buildInputs = [ cmake ]; cmakeFlags = let parallel_str = if parallel then "ON" else "OFF"; in "-DUSE_GNU_PARALLEL=${parallel_str}"; passthru = { inherit parallel; }; meta = { homepage = https://github.com/stxxl/stxxl; description = "An implementation of the C++ standard template library STL for external memory (out-of-core) computations"; license = stdenv.lib.licenses.boost; }; }