[Bug]: OneTrainer on FAT32

[Robson1970]

What happened?

Searching for a suitable Python installation...
Step 1: Checking for Python in PATH (to support Conda installs)...
Testing Python from PATH: "C:\Users\1\AppData\Local\Programs\Python\Python312\python.exe"
SELECTED Python from PATH: "C:\Users\1\AppData\Local\Programs\Python\Python312\python.exe"

Using Python: C:\Users\1\AppData\Local\Programs\Python\Python312\python.exe

Managing virtual environment...
Creating venv at "E:\OneTrainer\venv"...
Activating virtual environment...
Virtual environment activated.
Checking for Tkinter availability...
Tkinter is available, proceeding ...

Upgrading pip and installing dependencies from requirements.txt...
Executing: python -m pip install --upgrade pip
Requirement already satisfied: pip in e:\onetrainer\venv\lib\site-packages (25.0.1)
Collecting pip
Using cached pip-26.1.2-py3-none-any.whl.metadata (4.6 kB)
Using cached pip-26.1.2-py3-none-any.whl (1.8 MB)
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 25.0.1
Uninstalling pip-25.0.1:
Successfully uninstalled pip-25.0.1
Successfully installed pip-25.0.1
Executing: python -m pip install -r requirements.txt
Looking in indexes: https://pypi.org/simple, https://download.pytorch.org/whl/cu130
Ignoring nvidia-nccl-cu13: markers 'sys_platform == "linux"' don't match your environment
Obtaining diffusers from git+https://github.com/huggingface/diffusers.git@0f1abc4#egg=diffusers (from -r E:\OneTrainer\requirements-global.txt (line 23))
Cloning https://github.com/huggingface/diffusers.git (to revision 0f1abc4) to .\venv\src\diffusers
Running command git clone --filter=blob:none --quiet https://github.com/huggingface/diffusers.git 'E:\OneTrainer\venv\src\diffusers'
Did not find branch or tag '0f1abc4', assuming revision or ref.
error: subprocess-exited-with-error

× git rev-parse HEAD did not run successfully.
│ exit code: 128
╰─> [2 lines of output]
fatal: detected dubious ownership in repository at 'E:/OneTrainer/venv/src/diffusers'
'E:/OneTrainer/venv/src/diffusers' is on a file system that does not record ownership
To add an exception for this directory, call:

      git config --global --add safe.directory E:/OneTrainer/venv/src/diffusers
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'diffusers' when git rev-parse head

ERROR: Dependencies install failed

Drücken Sie eine beliebige Taste . . .

What did you expect would happen?

.

Relevant log output

Generate and upload debug_report.log

No response

[dxqb]

The install fails because the target drive (E:\) is a filesystem that doesn't record file ownership (common for exFAT/FAT32-formatted drives, some virtual disks, or network-mounted drives). When pip install -r requirements.txt clones diffusers via git into venv/src/diffusers, git's "dubious ownership"
safety check kicks in, since it can't verify the directory's owner matches the current user — and refuses to proceed.

This isn't a bug in OneTrainer itself; it's git's safety feature reacting to an unusual filesystem. But it does block install for anyone running OneTrainer from such a drive.

I don't know Windows well enough to decide whether this requires a workaround, but the root cause is git
@O-J1