shell.nix

with import <nixpkgs> {};

let
  toolz = pkgs.python35Packages.buildPythonPackage rec {
    name = "toolz-${version}";
    version = "0.8.0";

    src = pkgs.fetchurl {
      url = "mirror://pypi/t/toolz/toolz-${version}.tar.gz";
      sha256 = "e8451af61face57b7c5d09e71c0d27b8005f001ead56e9fdf470417e5cc6d479";
    };

    doCheck = false;

    meta = {
      homepage = "http://github.com/pytoolz/toolz/";
      description = "List processing tools and functional utilities";
    };
  };

in
stdenv.mkDerivation rec {
  name = "env";
  buildInputs = [
    hello
    (pkgs.python35.withPackages (ps: [ps.numpy toolz]))
  ];
}