Incompatible with PyTorch 2.9.0.dev20250813+cu128? 5060ti

[mikecolu]

I am getting the error message when trying to install SageAttention 2

Traceback (most recent call last):
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 389, in
main()
~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 373, in main
json_out["return_val"] = hook(**hook_input["kwargs"])
~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 303, in build_editable
return hook(wheel_directory, config_settings, metadata_directory)
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\build_meta.py", line 468, in build_editable
return self._build_with_temp_dir(
~~~~~~~~~~~~~~~~~~~~~~~~~^
cmd, ".whl", wheel_directory, config_settings
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\build_meta.py", line 404, in build_with_temp_dir
self.run_setup()
~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\build_meta.py", line 512, in run_setup
super().run_setup(setup_script=setup_script)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\build_meta.py", line 317, in run_setup
exec(code, locals())
~~~~^^^^^^^^^^^^^^^^
File "", line 220, in
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_init.py", line 115, in setup
return distutils.core.setup(**attrs)
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\core.py", line 186, in setup
return run_commands(dist)
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\core.py", line 202, in run_commands
dist.run_commands()
~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1002, in run_commands
self.run_command(cmd)
~~~~~~~~~~~~~~~~^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\dist.py", line 1102, in run_command
super().run_command(command)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1021, in run_command
cmd_obj.run()
~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\editable_wheel.py", line 139, in run
self._create_wheel_file(bdist_wheel)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\editable_wheel.py", line 349, in _create_wheel_file
files, mapping = self._run_build_commands(dist_name, unpacked, lib, tmp)
~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\editable_wheel.py", line 272, in _run_build_commands
self._run_build_subcommands()
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\editable_wheel.py", line 299, in _run_build_subcommands
self.run_command(name)
~~~~~~~~~~~~~~~~^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\cmd.py", line 357, in run_command
self.distribution.run_command(command)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\dist.py", line 1102, in run_command
super().run_command(command)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1021, in run_command
cmd_obj.run()
~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\build_ext.py", line 96, in run
_build_ext.run(self)
~~~~~~~~~~~~~~^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 368, in run
self.build_extensions()
~~~~~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 1071, in build_extensions
build_ext.build_extensions(self)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 484, in build_extensions
self._build_extensions_serial()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 510, in _build_extensions_serial
self.build_extension(ext)
~~~~~~~~~~~~~~~~~~~~^^^^^
File "", line 216, in build_extension
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\build_ext.py", line 261, in build_extension
_build_ext.build_extension(self, ext)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\Cython\Distutils\build_ext.py", line 136, in build_extension
super().build_extension(ext)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 565, in build_extension
objects = self.compiler.compile(
sources,
...<5 lines>...
depends=ext.depends,
)
File "", line 207, in compile_new
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 1040, in win_wrap_ninja_compile
_write_ninja_file_and_compile_objects(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
sources=sources,
^^^^^^^^^^^^^^^^
...<11 lines>...
with_cuda=with_cuda,
^^^^^^^^^^^^^^^^^^^^
with_sycl=False)
^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 2226, in _write_ninja_file_and_compile_objects
_run_ninja_build(
~~~~~~~~~~~~~~~~^
build_directory,
^^^^^^^^^^^^^^^^
...<2 lines>...
# that failed to build but there isn't a good way to get it here.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error_prefix='Error compiling objects for extension')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 2612, in _run_ninja_build
raise RuntimeError(message) from e
RuntimeError: Error compiling objects for extension
An error occurred when building editable wheel for sageattention.
See debugging tips in: https://setuptools.pypa.io/en/latest/userguide/development_mode.html#debugging-tips
[end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building editable for sageattention
Failed to build sageattention
error: failed-wheel-build-for-install

Failed to build installable wheels for some pyproject.toml based projects

sageattention
Traceback (most recent call last):
  File "<string>", line 2, in <module>
    exec(compile('''
    ~~~~^^^^^^^^^^^^
    # This is <pip-setuptools-caller> -- a caller that pip uses to run setup.py
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<32 lines>...
    exec(compile(setup_py_code, filename, "exec"))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ''' % ('D:\\src\\SageAttention\\setup.py',), "<pip-setuptools-caller>", "exec"))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<pip-setuptools-caller>", line 35, in <module>
  File "D:\src\SageAttention\setup.py", line 220, in <module>
    setup(
    ~~~~~^
        name='sageattention',
        ^^^^^^^^^^^^^^^^^^^^^
    ...<10 lines>...
        cmdclass={"build_ext": BuildExtensionSeparateDir} if ext_modules else {},
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\__init__.py", line 115, in setup
    return distutils.core.setup(**attrs)
           ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\_distutils\core.py", line 186, in setup
    return run_commands(dist)
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\_distutils\core.py", line 202, in run_commands
    dist.run_commands()
    ~~~~~~~~~~~~~~~~~^^
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\_distutils\dist.py", line 1002, in run_commands
    self.run_command(cmd)
    ~~~~~~~~~~~~~~~~^^^^^
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\dist.py", line 1102, in run_command
    super().run_command(command)
    ~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\_distutils\dist.py", line 1021, in run_command
    cmd_obj.run()
    ~~~~~~~~~~~^^
  File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\develop.py", line 39, in run
    subprocess.check_call(cmd)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "subprocess.py", line 419, in check_call
subprocess.CalledProcessError: Command '['D:\\AITools\\ComfyUI_windows_portable_nvidia\\ComfyUI_windows_portable\\python_embeded\\python.exe', '-m', 'pip', 'install', '-e', '.', '--use-pep517', '--no-deps']' returned non-zero exit status 1.
[end of output]

[NielsGx]

Yeah I got the same thing on windows with cu129
It was working fine with pytorch nightly a week ago though...

I went back to pytorch stable 2.8.0 because too lazy to find which pytorch nightly I was using 😴
(tho pytorch nighly fixed torch.compile not working with qwen-image + qwen lighting lora, but rip)

[StrongerXi]

I think #243 should fix this, but I don't have a windows machine so I can't test it out. If someone can give it a try that'll be great.

[StrongerXi]

Meanwhile I think you can install sage attention 2 with an older pytorch, and then install pytorch nightly.

[woct0rdho]

Is it the full error log? You can run python setup.py install --verbose to show more error log.

It seems the error is related to the ninja build tool. Ninja 1.13.0 has a bug on Windows, see ninja-build/ninja#2616 . The official ninja has released 1.13.1, but the ninja on pypi is a fork and needs some time to update, see scikit-build/ninja-python-distributions#308 . For now you can install an older version of ninja.

[mikecolu]

#243 did not fix it I will have to build it with another version of pytorch as suggested by @StrongerXi

ChatGPT says ninja stops as a result of the CPP compiler bailing out before it builds. If you are interested in the verbose logs here it is:

D:/AITools/ComfyUI_windows_portable_nvidia/ComfyUI_windows_portable/python_embeded/Lib/site-packages/torch/include\torch/csrc/dynamo/compiled_autograd.h(1181): note: see the first reference to 'torch::dynamo::autograd::IValuePacker<__int64>::packed_type' in 'torch::dynamo::autograd::IValuePacker::packed_type'
ninja: build stopped: subcommand failed.
Traceback (most recent call last):
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 2595, in _run_ninja_build
subprocess.run(
~~~~~~~~~~~~~~^
command,
^^^^^^^^
...<4 lines>...
check=True,
^^^^^^^^^^^
env=env)
^^^^^^^^
File "subprocess.py", line 577, in run
subprocess.CalledProcessError: Command '['ninja', '-v']' returned non-zero exit status 1.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "D:\src\SageAttention\setup.py", line 250, in
setup(
~~~~~^
name='sageattention',
^^^^^^^^^^^^^^^^^^^^^
...<10 lines>...
cmdclass={"build_ext": BuildExtensionSeparateDir} if ext_modules else {},
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_init_.py", line 115, in setup
return distutils.core.setup(**attrs)
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\core.py", line 186, in setup
return run_commands(dist)
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\core.py", line 202, in run_commands
dist.run_commands()
~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1002, in run_commands
self.run_command(cmd)
~~~~~~~~~~~~~~~~^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\dist.py", line 1102, in run_command
super().run_command(command)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1021, in run_command
cmd_obj.run()
~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\install.py", line 689, in run
self.run_command('build')
~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\cmd.py", line 357, in run_command
self.distribution.run_command(command)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\dist.py", line 1102, in run_command
super().run_command(command)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1021, in run_command
cmd_obj.run()
~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build.py", line 135, in run
self.run_command(cmd_name)
~~~~~~~~~~~~~~~~^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\cmd.py", line 357, in run_command
self.distribution.run_command(command)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\dist.py", line 1102, in run_command
super().run_command(command)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\dist.py", line 1021, in run_command
cmd_obj.run()
~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\build_ext.py", line 96, in run
_build_ext.run(self)
~~~~~~~~~~~~~~^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 368, in run
self.build_extensions()
~~~~~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 1071, in build_extensions
build_ext.build_extensions(self)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 484, in build_extensions
self._build_extensions_serial()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 510, in _build_extensions_serial
self.build_extension(ext)
~~~~~~~~~~~~~~~~~~~~^^^^^
File "D:\src\SageAttention\setup.py", line 246, in build_extension
objects = super().build_extension(ext)
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools\command\build_ext.py", line 261, in build_extension
_build_ext.build_extension(self, ext)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\Cython\Distutils\build_ext.py", line 136, in build_extension
super().build_extension(ext)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 565, in build_extension
objects = self.compiler.compile(
sources,
...<5 lines>...
depends=ext.depends,
)
File "D:\src\SageAttention\setup.py", line 237, in compile_new
return compile_orig(*args, **{
**kwargs,
...<2 lines>...
self.thread_ext_name_map[threading.current_thread().ident]),
})
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 1040, in win_wrap_ninja_compile
_write_ninja_file_and_compile_objects(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
sources=sources,
^^^^^^^^^^^^^^^^
...<11 lines>...
with_cuda=with_cuda,
^^^^^^^^^^^^^^^^^^^^
with_sycl=False)
^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 2226, in _write_ninja_file_and_compile_objects
_run_ninja_build(
~~~~~~~~~~~~~~~~^
build_directory,
^^^^^^^^^^^^^^^^
...<2 lines>...
# that failed to build but there isn't a good way to get it here.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error_prefix='Error compiling objects for extension')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\cpp_extension.py", line 2612, in _run_ninja_build
raise RuntimeError(message) from e
RuntimeError: Error compiling objects for extension

[woct0rdho]

I see, it's not that bug of ninja. If you comment out the following lines at D:\AITools\ComfyUI_windows_portable_nvidia\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\include\torch\csrc\dynamo\compiled_autograd.h, line 1134:

} else if constexpr (::std::is_same_v<T, ::std::string>) {
  return at::StringType::get();

Then it can build with PyTorch 2.9.0.dev20250813 .

This should be related to how MSVC finds the namespaces, and there should be a proper fix in PyTorch.

[laiww3]

hello, could you tell me how to down torch with version 2.9.0.dev20250804+cu128? give a url, thank you ~

[woct0rdho]

@laiww3 Follow the guide here https://pytorch.org/get-started/locally/ and choose 'Preview (Nightly)'. However, the nightly version is unstable and you should expect a lot of problems.

[brianb5010]

the suggestion to comment out lines 1134 and 1135 worked for me for python 13.9, torch 2.9.0.dev20250902+cu129 on windows. I also made the changes above in #243 to setup.py.