Build Failure on Windows: Missing dependency 'dskernels'

[radiantone]

(venv) PS I:\AI\Tools\index-tts> uv sync --all-extras
warning: VIRTUAL_ENV=venv does not match the project environment path .venv and will be ignored; use --active to target the active environment instead
Resolved 190 packages in 0.99ms
× Failed to build deepspeed==0.17.1
├─▶ The build backend returned an error
╰─▶ Call to setuptools.build_meta:__legacy__.build_wheel failed (exit code: 1)

  [stdout]
  [2025-09-18 10:30:45,585] [INFO] [real_accelerator.py:254:get_accelerator] Setting
  ds_accelerator to cuda (auto detect)
  [2025-09-18 10:30:45,791] [INFO] [real_accelerator.py:254:get_accelerator] Setting
  ds_accelerator to cuda (auto detect)
  [2025-09-18 10:30:49,581] [INFO] [logging.py:107:log_dist] [Rank -1]
  [TorchCheckpointEngine] Initialized with serialization = False
  DS_BUILD_OPS=1
   [WARNING]  Skip pre-compile of incompatible async_io; One can disable async_io
  with DS_BUILD_AIO=0
   [WARNING]  Skip pre-compile of incompatible evoformer_attn; One can disable
  evoformer_attn with DS_BUILD_EVOFORMER_ATTN=0
   [WARNING]  Skip pre-compile of incompatible fp_quantizer; One can disable
  fp_quantizer with DS_BUILD_FP_QUANTIZER=0
   [WARNING]  Skip pre-compile of incompatible gds; One can disable gds with
  DS_BUILD_GDS=0
   [WARNING]  Filtered compute capabilities [['6', '0'], ['6', '1'], ['7', '0']]

  [stderr]
  W0918 10:30:47.589000 27548
  Lib\site-packages\torch\distributed\elastic\multiprocessing\redirects.py:29] NOTE:
  Redirects are currently not supported in Windows or MacOs.
  Traceback (most recent call last):
    File "<string>", line 11, in <module>
    File "I:\AI\Tools\index-tts\.venv\lib\site-packages\setuptools\build_meta.py",
  line 432, in build_wheel
      return _build(['bdist_wheel'])
    File "I:\AI\Tools\index-tts\.venv\lib\site-packages\setuptools\build_meta.py",
  line 423, in _build
      return self._build_with_temp_dir(
    File "I:\AI\Tools\index-tts\.venv\lib\site-packages\setuptools\build_meta.py",
  line 404, in _build_with_temp_dir
      self.run_setup()
    File "I:\AI\Tools\index-tts\.venv\lib\site-packages\setuptools\build_meta.py",
  line 512, in run_setup
      super().run_setup(setup_script=setup_script)
    File "I:\AI\Tools\index-tts\.venv\lib\site-packages\setuptools\build_meta.py",
  line 317, in run_setup
      exec(code, locals())
    File "<string>", line 201, in <module>
    File
  "C:\Users\VYRAL\AppData\Local\uv\cache\sdists-v9\pypi\deepspeed\0.17.1\tDkOAe7XfEvmQuoy7uXE2\src\op_builder\builder.py",
  line 730, in builder
      extra_link_args=self.strip_empty_entries(self.extra_ldflags()))
    File
  "C:\Users\VYRAL\AppData\Local\uv\cache\sdists-v9\pypi\deepspeed\0.17.1\tDkOAe7XfEvmQuoy7uXE2\src\op_builder\inference_cutlass_builder.py",
  line 74, in extra_ldflags
      import dskernels
  ModuleNotFoundError: No module named 'dskernels'

  hint: This error likely indicates that `deepspeed@0.17.1` depends on `dskernels`,
  but doesn't declare it as a build dependency. If `deepspeed` is a first-party
  package, consider adding `dskernels` to its `build-system.requires`. Otherwise,
  either add it to your `pyproject.toml` under:

  [tool.uv.extra-build-dependencies]
  deepspeed = ["dskernels"]

  or `uv pip install dskernels` into the environment and re-run with
  `--no-build-isolation`.

help: deepspeed (v0.17.1) was included because indextts[deepspeed] (v2.0.0) depends
on deepspeed

...

(venv) PS I:\AI\Tools\index-tts> uv pip install dskernels
Using Python 3.13.7 environment at: venv
× No solution found when resolving dependencies:
╰─▶ Because dskernels was not found in the package registry and you require dskernels,
we can conclude that your requirements are unsatisfiable.

[radiantone]

deepspeedai/DeepSpeed#4669

[Arcitec]

It is extremely difficult to install DeepSpeed on Windows, and for most people it is not worth it since DeepSpeed is often much slower than without DeepSpeed. So I recommend either using Linux if you want to see if DeepSpeed is slower/faster for your machine, or not installing DeepSpeed at all. You aren't missing much. A 3090 can generate ~2 minutes of audio in ~20 seconds without DeepSpeed, with FP16 format. And it's 4-5x slower when using DeepSpeed, at least for me on Linux.

[radiantone]

It is extremely difficult to install DeepSpeed on Windows, and for most people it is not worth it since DeepSpeed is often much slower than without DeepSpeed. So I recommend either using Linux if you want to see if DeepSpeed is slower/faster for your machine, or not installing DeepSpeed at all. You aren't missing much. A 3090 can generate ~2 minutes of audio in ~20 seconds without DeepSpeed, with FP16 format. And it's 4-5x slower when using DeepSpeed, at least for me on Linux.

Ok, thanks for the tip. I only try to install it because this other AI package depends on it Index-TTS2, but I will just install it on my linux machine.