issue with nvidia apex

[Roy101]

trying to pip install from apex directory, I am getting following errors.

commands:

git clone https://github.com/NVIDIA/apex
cd apex
pip install -v --disable-pip-version-check --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" .

error message:

Traceback (most recent call last):
    File "/home/usr/anaconda3/envs/newvenvconda/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
      main()
    File "/home/usr/anaconda3/envs/newvenvconda/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/home/usr/anaconda3/envs/newvenvconda/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
      return hook(config_settings)
    File "/tmp/pip-build-env-0aayo32i/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 332, in get_requires_for_build_wheel
      return self._get_build_requires(config_settings, requirements=[])
    File "/tmp/pip-build-env-0aayo32i/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 302, in _get_build_requires
      self.run_setup()
    File "/tmp/pip-build-env-0aayo32i/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 318, in run_setup
      exec(code, locals())
    File "<string>", line 10, in <module>
  ModuleNotFoundError: No module named 'torch'
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> See above for output.
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  full command: /home/usr/anaconda3/envs/newvenvconda/bin/python /home/usr/anaconda3/envs/newvenvconda/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py get_requires_for_build_wheel /tmp/tmpaocptoj0
  cwd: /home/usr/Desktop/new/transclone/apex
  Getting requirements to build wheel ... error
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

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

how to fix it?

Installed versions:

Python 3.8.19 (default, Mar 20 2024, 19:58:24)

import torch

print("PyTorch version:", torch.__version__)

if torch.cuda.is_available():
    print("CUDA is available. CUDA version:", torch.version.cuda)
else:
    print("CUDA is not available.")


Output:

PyTorch version: 1.13.0+cu116

CUDA is available. CUDA version: 11.6