subprocess.CalledProcessError: Command '['path/to/cuda-11.7/bin/nvcc', '-V']' returned non-zero exit status 255

[ChosenOne-xx]

when I pip install flash-attn==2.3.2, I encounter the error:

Collecting flash-attn==2.3.2
Using cached flash_attn-2.3.2.tar.gz (2.3 MB)
Preparing metadata (setup.py) ... error
error: subprocess-exited-with-error

× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [18 lines of output]
fatal: 不是 git 仓库（或者任何父目录）：.git
Traceback (most recent call last):
File "", line 2, in
File "", line 34, in
File "/tmp/pip-install-scguzyaj/flash-attn_005ea1320f3541e29f263d6aefd02a9d/setup.py", line 115, in
_, bare_metal_version = get_cuda_bare_metal_version(CUDA_HOME)
File "/tmp/pip-install-scguzyaj/flash-attn_005ea1320f3541e29f263d6aefd02a9d/setup.py", line 66, in get_cuda_bare_metal_version
raw_output = subprocess.check_output([cuda_dir + "/bin/nvcc", "-V"], universal_newlines=True)
File "/home/zhangxu/anaconda3/envs/sparsedrive/lib/python3.8/subprocess.py", line 415, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
File "/home/zhangxu/anaconda3/envs/sparsedrive/lib/python3.8/subprocess.py", line 516, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/home/zhangxu/cuda/cuda-11.7/bin/nvcc', '-V']' returned non-zero exit status 255.

  torch.__version__  = 1.13.0+cu117
  
  
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

I have checked my cuda as following:

nvcc -V
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2022 NVIDIA Corporation
Built on Wed_Jun__8_16:49:14_PDT_2022
Cuda compilation tools, release 11.7, V11.7.99
Build cuda_11.7.r11.7/compiler.31442593_0

which nvcc
/home/zhangxu/cuda/cuda-11.7/bin/nvcc

echo $CUDA_HOME
/home/zhangxu/cuda/cuda-11.7

It seems right. I dont understand what's wrong with my envs, can you help me? Thanks a lot!