Fresh ComfyUI with Triton & Sage Attention Installation failure

[LesPles]

What happened?

1. Clean install of a new ComfyUI Package
2. Start package normally, installs dependencies etc. no issues, numerous times
3. Stop the package
4. From Packages screen, select 3 dots, Package Commands, Install Triton and Sage Attention
5. Installation starts, and end in an error - related to "distutils was removed from the standard library... "

Exception Details

Installing Triton
Using Python 3.12.11 environment at: venv
Resolved 2 packages in 105ms
Installed 1 package in 16ms

• triton-windows==3.4.0.post20
  Downloading Python libraries
  Download complete!
  Extracting Python libraries
  Downloading SageAttention
  Cloning into 'D:\StabilityMatrix\Data\Packages\ComfyUITritonSage\SageAttention'...
  Installing SageAttention
  Using Python 3.12.11 environment at: venv
  error: The build backend returned an error
  Caused by: Call to setuptools.build_meta:__legacy__.build_wheel failed (exit code: 1)

[stderr]
Traceback (most recent call last):
File "", line 8, in
File "D:\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpJR34Ed\Lib\site-packages\setuptools_init_.py", line 23, in
from . import logging, monkey
File "D:\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpJR34Ed\Lib\site-packages\setuptools\logging.py", line 5, in
from . import monkey
File "D:\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpJR34Ed\Lib\site-packages\setuptools\monkey.py", line 13, in
import distutils.filelist
ModuleNotFoundError: No module named 'distutils'

hint: distutils was removed from the standard library in Python 3.12. Consider adding a constraint to avoid building a package that depends on distutils.
Error: StabilityMatrix.Core.Exceptions.ProcessException: pip install failed with code 2: 'Using Python 3.12.11 environment at: venv\nerror: The build backend returned an error\n Caused by: Call to setuptools.build_meta:__legacy__.build_wheel failed (exit code: 1)\n\n[stderr]\nTraceback (most recent call last):\n File "", line 8, in \n File "D:\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpJR34Ed\Lib\site-packages\setuptools_init_.py", line 23, in \n from . import logging, monkey\n File "D:\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpJR34Ed\Lib\site-packages\setuptools\logging.py", line 5, in \n from . import monkey\n File "D:\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpJR34Ed\Lib\site-packages\setuptools\monkey.py", line 13, in \n import distutils.filelist\nModuleNotFoundError: No module named 'distutils'\n\nhint: distutils was removed from the standard library in Python 3.12. Consider adding a constraint to avoid building a package that depends on distutils.\n'
at StabilityMatrix.Core.Python.UvVenvRunner.PipInstall(ProcessArgs args, Action1 outputDataReceived) at StabilityMatrix.Core.Models.PackageModification.InstallSageAttentionStep.ExecuteAsync(IProgress1 progress)
at StabilityMatrix.Core.Models.PackageModification.InstallSageAttentionStep.ExecuteAsync(IProgress1 progress) at StabilityMatrix.Core.Models.PackageModification.PackageModificationRunner.ExecuteSteps(IEnumerable1 steps)

Version

v2.15

What Operating System are you using?

Windows

[b4nn3d]

Same problem here, windows 11, fresh install

[shalim2904]

same issue with FramePack in Linux

[james-banks]

I've had similar errors previously caused by trying to install older packages in Python 3.12.

This is something package maintainers can easily fix, but in lieu of that just set the following environment variable in SM:

SETUPTOOLS_USE_DISTUTILS=stdlib

SETUPTOOLS_USE_DISTUTILS=local

[s3to87]

I got the same issue and have set the environment variable in SM as suggested but unfortunately this did not fix it for me, installation still fails with the same error message:

Installing Triton
Using Python 3.12.11 environment at: venv
Audited 1 package in 2ms
Downloading Python libraries
Installing SageAttention
Using Python 3.12.11 environment at: venv
error: The build backend returned an error
Caused by: Call to setuptools.build_meta.build_wheel failed (exit code: 1)

[stderr]
Traceback (most recent call last):
File "", line 8, in
File "D:\Programme\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpuRDE6p\Lib\site-packages\setuptools_init_.py", line 24, in
from . import logging, monkey
File "D:\Programme\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpuRDE6p\Lib\site-packages\setuptools\logging.py", line 5, in
from . import monkey
File "D:\Programme\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpuRDE6p\Lib\site-packages\setuptools\monkey.py", line 13, in
import distutils.filelist
ModuleNotFoundError: No module named 'distutils'

hint: distutils was removed from the standard library in Python 3.12. Consider adding a constraint to avoid building a package that depends on distutils.
Error: StabilityMatrix.Core.Exceptions.ProcessException: pip install failed with code 2: 'Using Python 3.12.11 environment at: venv\nerror: The build backend returned an error\n Caused by: Call to setuptools.build_meta.build_wheel failed (exit code: 1)\n\n[stderr]\nTraceback (most recent call last):\n File "", line 8, in \n File "D:\Programme\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpuRDE6p\Lib\site-packages\setuptools_init_.py", line 24, in \n from . import logging, monkey\n File "D:\Programme\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpuRDE6p\Lib\site-packages\setuptools\logging.py", line 5, in \n from . import monkey\n File "D:\Programme\StabilityMatrix\Data\Assets\uv\cache\builds-v0.tmpuRDE6p\Lib\site-packages\setuptools\monkey.py", line 13, in \n import distutils.filelist\nModuleNotFoundError: No module named 'distutils'\n\nhint: distutils was removed from the standard library in Python 3.12. Consider adding a constraint to avoid building a package that depends on distutils.\n'
at StabilityMatrix.Core.Python.UvVenvRunner.PipInstall(ProcessArgs args, Action1 outputDataReceived) at StabilityMatrix.Core.Models.PackageModification.InstallSageAttentionStep.ExecuteAsync(IProgress1 progress)
at StabilityMatrix.Core.Models.PackageModification.InstallSageAttentionStep.ExecuteAsync(IProgress1 progress) at StabilityMatrix.Core.Models.PackageModification.PackageModificationRunner.ExecuteSteps(IEnumerable1 steps)

[james-banks]

I got the same issue and have set the environment variable in SM as suggested but unfortunately this did not fix it for me, installation still fails with the same error message:

Apologies, I had the wrong suggestion above - you want to set it to local instead. E.g. via Powershell:

setx SETUPTOOLS_USE_DISTUTILS "local"

[mohnjiles]

Sorry, seems that torch updated to 2.9.1 and there isn't a corresponding pre-built wheel for that version yet. Will get an update out when it exists; in the meantime you can rollback to v2.9.0 of torch for the "easy-button" to work properly.

[s3to87]

Downgrading torch to 2.9.0 fixed it for me, thanks for the advice!

[Sylus094]

Downgrading torch to 2.9.0 fixed it for me, thanks for the advice!

Downgrade to 2.9.0 fixed my same issue as well, as for now.