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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Pre-commit install fails on Windows network mount drive","articleBody":"Hi, I'm trying to help some team members set up pre-commit on a Windows network mount drive, and they're encountering an issue with paths. Seems related to [this comment](https://github.com/pre-commit/pre-commit/issues/1610#issuecomment-719774326) in #1610, which seems to be a different issue than the one the original issue, as we are on the most recent version of pre-commit and git, and the fix that was merged in #1727 for that doesn't seem to address this issue. I also tried other versions of Git for Windows \u003c2.25, and the issue still seemed to persist.\r\n\r\nI tested the solution that @christopherdoyle proposed, and that does seems to fix this issue with network mount drives, though I saw that @asottile would prefer not to use `pathlib`. I am not able to propose a fix right now, but I wanted to raise this as an issue that still exists.\r\n\r\nFull error below:\r\n\r\n```\r\n    ### version information\r\n    \r\n    ```\r\n    pre-commit version: 2.10.1\r\n    sys.version:\r\n        3.9.1 | packaged by conda-forge | (default, Jan 26 2021, 01:29:07) [MSC v.1916 64 bit (AMD64)]\r\n    sys.executable: C:\\Users\\roderick\\.conda\\envs\\nmt\\python.exe\r\n    os.name: nt\r\n    sys.platform: win32\r\n    ```\r\n    \r\n    ### error information\r\n    \r\n    ```\r\n    An unexpected error has occurred: ValueError: path is on mount 'S:', start on mount '\\\\\\\\MyServer\\Directory'\r\n    ```\r\n    \r\n    ```\r\n    Traceback (most recent call last):\r\n      File \"C:\\Users\\roderick\\.conda\\envs\\nmt\\lib\\site-packages\\pre_commit\\error_handler.py\", line 65, in error_handler\r\n        yield\r\n      File \"C:\\Users\\roderick\\.conda\\envs\\nmt\\lib\\site-packages\\pre_commit\\main.py\", line 333, in main\r\n        _adjust_args_and_chdir(args)\r\n      File \"C:\\Users\\roderick\\.conda\\envs\\nmt\\lib\\site-packages\\pre_commit\\main.py\", line 153, in _adjust_args_and_chdir\r\n        args.config = os.path.relpath(args.config)\r\n      File \"C:\\Users\\roderick\\.conda\\envs\\nmt\\lib\\ntpath.py\", line 703, in relpath\r\n        raise ValueError(\"path is on mount %r, start on mount %r\" % (\r\n    ValueError: path is on mount 'S:', start on mount '\\\\\\\\MyServer\\Directory'\r\n```\r\n\r\n```","author":{"url":"https://github.com/goroderickgo","@type":"Person","name":"goroderickgo"},"datePublished":"2021-02-17T14:52:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/1802/pre-commit/issues/1802"}