0.0.34 claims to support PyTorch>=2.10 but it doesn't?
Author: levickiCreated Jan 24, 2026Updated Feb 5, 2026
Release notes say:
Pre-built binary wheels are available for PyTorch 2.10.0 (and later).
However:
(venv) d:\AI\ComfyUI>pip install xformers==0.0.34
Collecting xformers==0.0.34
Using cached xformers-0.0.34-cp39-abi3-win_amd64.whl.metadata (1.0 kB)
Requirement already satisfied: numpy in d:\ai\comfyui\venv\lib\site-packages (from xformers==0.0.34) (2.4.0)
INFO: pip is looking at multiple versions of xformers to determine which version is compatible with other requirements. This could take a while.
ERROR: Cannot install xformers==0.0.34 because these package versions have conflicting dependencies.
The conflict is caused by:
xformers 0.0.34 depends on torch==2.10.0
The user requested (constraint) torch==2.11.0.dev20260124+cu130
Additionally, some packages in these conflicts have no matching distributions available for your environment:
torch
To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip to attempt to solve the dependency conflict
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflictsMy environment is Python 3.14.2, Windows 10 x64.
Note that the same error happens if I explicitly use pip install xformers==0.0.34 --index-url https://download.pytorch.org/whl/cu130.
Finally, if I install xformers and torch 2.10+cu130 I am still missing triton:
pytorch version: 2.10.0+cu130
A matching Triton is not available, some optimizations will not be enabled
Traceback (most recent call last):
File "d:\AI\ComfyUI\venv\Lib\site-packages\\\xformers\__init__.py", line 57, in _is_triton_available
import triton # noqa
^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'triton'
xformers version: 0.0.34I have tried building xformers with CUDA 13.0/13.1 myself but as I reported earlier the build is broken in the sense that with CUDA 13.x it doesn't seem to produce any triton related code in the wheel. Maybe that's on purpose and maybe it was announced somewhere but if so I am not aware of it. Would be nice to get a clarification.
Please advise.
Source: facebookresearch/xformers