{ stdenv, fetchurl, readline }:

stdenv.mkDerivation rec {
  name = "spidermonkey-1.7";

  src = fetchurl {
    url = https://ftp.mozilla.org/pub/js/js-1.7.0.tar.gz;
    sha256 = "12v6v2ccw1y6ng3kny3xw0lfs58d1klylqq707k0x04m707kydj4";
  };

  buildInputs = [ readline ];

  postUnpack = "sourceRoot=\${sourceRoot}/src";

  makefileExtra = ./Makefile.extra;
  makefile = "Makefile.ref";

  patchPhase =
    ''
      cat ${makefileExtra} >> ${makefile}
      sed -e 's/ -ltermcap/ -lncurses/' -i ${makefile}
    '';

  CFLAGS = "-DPIC -fPIC -DJS_C_STRINGS_ARE_UTF8";

  makeFlags = "-f ${makefile} JS_DIST=\${out} BUILD_OPT=1 JS_READLINE=1";
}