Trying to install xformers error: subprocess-exited-with-error

[Wannafly7]

Why it doesn't see my torch?

(myenv) wannafly@wannafly:~/SD/stable-diffusion-webui/repositories/xformers$ pip install -e .
Obtaining file:///home/wannafly/SD/stable-diffusion-webui/repositories/xformers
Installing build dependencies ... done
Checking if build backend supports build_editable ... done
Getting requirements to build editable ... error
error: subprocess-exited-with-error

× Getting requirements to build editable did not run successfully.
│ exit code: 1
╰─> [23 lines of output]
Traceback (most recent call last):
File "/home/wannafly/SD/stable-diffusion-webui/repositories/xformers/myenv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in
main()
File "/home/wannafly/SD/stable-diffusion-webui/repositories/xformers/myenv/lib/python3.11/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/wannafly/SD/stable-diffusion-webui/repositories/xformers/myenv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 132, in get_requires_for_build_editable
return hook(config_settings)
^^^^^^^^^^^^^^^^^^^^^
File "/tmp/pip-build-env-a0hgt_fb/overlay/lib/python3.11/site-packages/setuptools/build_meta.py", line 448, in get_requires_for_build_editable
return self.get_requires_for_build_wheel(config_settings)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/tmp/pip-build-env-a0hgt_fb/overlay/lib/python3.11/site-packages/setuptools/build_meta.py", line 325, in get_requires_for_build_wheel
return self._get_build_requires(config_settings, requirements=['wheel'])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/tmp/pip-build-env-a0hgt_fb/overlay/lib/python3.11/site-packages/setuptools/build_meta.py", line 295, in _get_build_requires
self.run_setup()
File "/tmp/pip-build-env-a0hgt_fb/overlay/lib/python3.11/site-packages/setuptools/build_meta.py", line 487, in run_setup
super().run_setup(setup_script=setup_script)
File "/tmp/pip-build-env-a0hgt_fb/overlay/lib/python3.11/site-packages/setuptools/build_meta.py", line 311, in run_setup
exec(code, locals())
File "", line 23, in
ModuleNotFoundError: No module named 'torch'
[end of output]

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

× Getting requirements to build editable 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.