lxml wheel won't build when installing pretext with pip

[Matt Wechter]

I can't get Pretext to download using pip on my Windows 11 machine.  The error is below.  Could the probably be with the Microsoft VS Build Tools, which I recently updated?

 "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -DCYTHON_CLINE_IN_TRACEBACK=0 -Isrc -Isrc\lxml\includes -IC:\Users\wechterm\AppData\Local\Python\pythoncore-3.14-64\include -IC:\Users\wechterm\AppData\Local\Python\pythoncore-3.14-64\Include "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Auxiliary\VS\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.26100.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\um" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\shared" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\winrt" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\cppwinrt" /Tcsrc\lxml\etree.c /Fobuild\temp.win-amd64-cpython-314\Release\src\lxml\etree.obj -w

      cl : Command line warning D9025 : overriding '/W3' with '/w'
      etree.c
      C:\Users\wechterm\AppData\Local\Temp\pip-install-51sxmmgl\lxml_6f5f07ffa0eb48928c33f5bccd75418f\src\lxml\includes/etree_defs.h(12): fatal error C1083: Cannot open include file: 'libxml/xmlversion.h': No such file or directory
      Compile failed: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2022\\BuildTools\\VC\\Tools\\MSVC\\14.44.35207\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
      creating Users\wechterm\AppData\Local\Temp
      "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -I/usr/include/libxml2 "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Auxiliary\VS\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.26100.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\um" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\shared" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\winrt" "-IC:\Program Files (x86)\Windows Kits\10\\include\10.0.26100.0\\cppwinrt" /TcC:\Users\wechterm\AppData\Local\Temp\xmlXPathInitcvt2cq_l.c /FoUsers\wechterm\AppData\Local\Temp\xmlXPathInitcvt2cq_l.obj
      xmlXPathInitcvt2cq_l.c
      C:\Users\wechterm\AppData\Local\Temp\xmlXPathInitcvt2cq_l.c(1): fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
      *********************************************************************************
      Could not find function xmlXPathInit in library libxml2. Is libxml2 installed?
      Is your C compiler installed and configured correctly?
      *********************************************************************************
      error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2022\\BuildTools\\VC\\Tools\\MSVC\\14.44.35207\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
      [end of output]

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

× Failed to build installable wheels for some pyproject.toml based projects
╰─> lxml

[Sean Fitzpatrick]

I had the same problem a week ago, but unfortunately I have not figured out a solution. 

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