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This still uses the old pattern (seems like an easy fix):

• cuda-python/cuda_core/build_hooks.py

  Lines 27 to 34 in 9209861

  	@functools.cache
  	def _get_cuda_paths() -> list[str]:
  	CUDA_PATH = os.environ.get("CUDA_PATH", os.environ.get("CUDA_HOME", None))
  	if not CUDA_PATH:
  	raise RuntimeError("Environment variable CUDA_PATH or CUDA_HOME is not set")
  	CUDA_PATH = CUDA_PATH.split(os.pathsep)
  	print("CUDA paths:", CUDA_PATH)
  	return CUDA_PATH

This

• cuda-python/cuda_core/examples/thread_block_cluster.py

  Lines 29 to 39 in 9209861

  	# prepare include
  	cuda_path = os.environ.get("CUDA_PATH", os.environ.get("CUDA_HOME"))
  	if cuda_path is None:
  	print("this demo requires a valid CUDA_PATH environment variable set", file=sys.stderr)
  	sys.exit(0)
  	cuda_include = os.path.join(cuda_path, "include")
  	assert os.path.isdir(cuda_include)
  	include_path = [cuda_include]
  	cccl_include = os.path.join(cuda_include, "cccl")
  	if os.path.isdir(cccl_include):
  	include_path.insert(0, cccl_include)

should probably be updated to use pathfinder, similar to what I did here a few days ago:

• https://github.com/NVIDIA/cuda-python/pull/1517/changes#diff-05f39cca605623dd14a77796b2946b349846c0a2e08e06ea0b485d5819b117a0

I could take care of that in a separate, small PR. Should I?