{ fetchurl, stdenv, octave ? null }:

stdenv.mkDerivation rec {
  name = "nlopt-2.4.2";

  src = fetchurl {
    url = "http://ab-initio.mit.edu/nlopt/${name}.tar.gz";
    sha256 = "12cfkkhcdf4zmb6h7y6qvvdvqjs2xf9sjpa3rl3bq76px4yn76c0";
  };

  buildInputs = [ octave ];

  configureFlags = [
    "--with-cxx"
    "--enable-shared"
    "--with-pic"
    "--without-guile"
    "--without-python"
    "--without-matlab"
  ] ++ stdenv.lib.optionals (octave != null) [
    "--with-octave"
    "M_INSTALL_DIR=$(out)/${octave.sitePath}/m"
    "OCT_INSTALL_DIR=$(out)/${octave.sitePath}/oct"
  ];

  meta = {
    homepage = http://ab-initio.mit.edu/nlopt/;
    description = "Free open-source library for nonlinear optimization";
    license = stdenv.lib.licenses.lgpl21Plus;
    hydraPlatforms = stdenv.lib.platforms.linux;
    broken = (octave != null);              # cannot cope with Octave 4.x
  };

}