Python 3.10安装fastchunking失败：无法创建目录的原因排查

云原生阿岚

2026-6-16

问题

为满足父工具版本要求，需使用Python 3.10安装fastchunking依赖，执行命令python.exe -m pip install fastchunking时构建wheel失败，核心错误是无法创建指定临时build目录，详细报错信息如下：

$> python.exe -m pip install fastchunking
Collecting fastchunking
  Downloading fastchunking-0.0.3.tar.gz (24 kB)
  Preparing metadata (setup.py) ... done
Requirement already satisfied: pybindgen in c:\program files\python310\lib\site-packages (from fastchunking) (0.21.0)
Building wheels for collected packages: fastchunking
  Building wheel for fastchunking (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [25 lines of output]
      Generating file C:\Users\alexander.been.LC\AppData\Local\Temp\pip-install-gu2m0whc\fastchunking_45690b13b00046fcbf5b3e0d96787acf\build\rabinkarprh.cpp
      running bdist_wheel
      running build
      running build_py
      creating build\lib.win-amd64-cpython-310
      creating build\lib.win-amd64-cpython-310\fastchunking
      copying fastchunking\benchmark.py -> build\lib.win-amd64-cpython-310\fastchunking
      copying fastchunking\test.py -> build\lib.win-amd64-cpython-310\fastchunking
      copying fastchunking\__init__.py -> build\lib.win-amd64-cpython-310\fastchunking
      creating build\lib.win-amd64-cpython-310\lib
      copying lib\rabinkarpgen.py -> build\lib.win-amd64-cpython-310\lib
      copying lib\rabinkarp_gen.py -> build\lib.win-amd64-cpython-310\lib
      copying lib\__init__.py -> build\lib.win-amd64-cpython-310\lib
      running build_ext
      building 'fastchunking._rabinkarprh' extension
      creating build\temp.win-amd64-cpython-310
      creating build\temp.win-amd64-cpython-310\Release
      creating build\temp.win-amd64-cpython-310\Release\Users
      creating build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC
      creating build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC\AppData
      creating build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC\AppData\Local
      creating build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC\AppData\Local\Temp
      creating build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC\AppData\Local\Temp\pip-install-gu2m0whc
      creating build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC\AppData\Local\Temp\pip-install-gu2m0whc\fastchunking_45690b13b00046fcbf5b3e0d96787acf
      error: could not create 'build\temp.win-amd64-cpython-310\Release\Users\alexander.been.LC\AppData\Local\Temp\pip-install-gu2m0whc\fastchunking_45690b13b00046fcbf5b3e0d96787acf': The system cannot find the path specified
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for fastchunking
  Running setup.py clean for fastchunking
Failed to build fastchunking
ERROR: ERROR: Failed to build installable wheels for some pyproject.toml based projects (fastchunking)

可能原因

临时目录路径过长：Windows默认限制文件路径最大260字符，报错里的临时build目录路径明显超出这个长度，导致系统无法识别并创建目录。
权限不足：当前用户没有在C:\Users\alexander.been.LC\AppData\Local\Temp目录下创建子目录的权限，或者该临时目录本身存在权限配置问题。
临时目录被提前清理：pip下载的临时包目录可能被系统磁盘清理工具、杀毒软件或其他进程提前删除，后续创建子目录时找不到父路径。
包构建脚本存在bug：fastchunking的setup脚本在生成临时build路径时逻辑错误，错误地将完整用户临时路径嵌套到build目录下，导致路径异常。

内容的提问来源于stack exchange，提问作者NotRightMeow