with import <nixpkgs> {}; {
  sdlEnv = stdenv.mkDerivation {
    name = "tf-test";
    shellHook = ''
      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${stdenv.cc.cc.lib}/lib
      export LIBRARY_PATH=$LD_LIBRARY_PATH:${stdenv.cc.cc.lib}/lib
      alias pip="PIP_PREFIX='$(pwd)/_build/pip_packages' TMPDIR='$HOME' \pip"
      export PYTHONPATH="$(pwd)/_build/pip_packages/lib/python3.7/site-packages:$PYTHONPATH"
      export PATH="$(pwd)/_build/pip_packages/bin:$PATH"
    '';
    buildInputs = [
      rustup openssl
      python37 python37Packages.pip python37Packages.setuptools python37Packages.numpy
    ];
  };
}