old_contents: import pkg_resources
  import numba
  from .pynndescent_ import NNDescent, PyNNDescentTransformer
  
  # Workaround: https://github.com/numba/numba/issues/3341
  # numba.config.THREADING_LAYER = "workqueue"
  # numba.config.THREADING_LAYER = "tbb"
  
  __version__ = pkg_resources.get_distribution("pynndescent").version
  
new_contents: import pkg_resources
  import numba
  from .pynndescent_ import NNDescent, PyNNDescentTransformer
  
  # Workaround: https://github.com/numba/numba/issues/3341
  try:
      from numba.np.ufunc import tbbpool
      numba.config.THREADING_LAYER = "tbb"
  except ImportError as e:
      # might be a missing symbol due to e.g. tbb libraries missing
      numba.config.THREADING_LAYER = "workqueue"
  
  __version__ = pkg_resources.get_distribution("pynndescent").version
  
subject: Tweak the threading import