Installation issue with pip, building from source

[Jeremy Sanders]

Hi -

Has anyone else encountered this issue? It fails for me with 
pyqt6-6.9.0, sip-6.11.0, qt-6.9.0 and pip 25.1.1, on both Windows and 
Ubuntu 22.04.

It worked previously with pyqt6-6.9.0, sip-6.10.0 and pip 25.1.1, 
suggesting that this might be a sip issue.

Thanks

Jeremy

-----

python3 -m pip -v install --config-settings --confirm-license= 
--no-binary :all: PyQt6

...

   Compiling the project...
   Installing the project...
   Traceback (most recent call last):
     File 
"C:\hostedtoolcache\windows\Python\3.13.3\x64\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", 
line 389, in <module>
       main()
       ~~~~^^
     File 
"C:\hostedtoolcache\windows\Python\3.13.3\x64\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 
"C:\hostedtoolcache\windows\Python\3.13.3\x64\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", 
line 179, in prepare_metadata_for_build_wheel
       return _get_wheel_metadata_from_wheel(
           whl_basename, metadata_directory, config_settings
       )
     File 
"C:\hostedtoolcache\windows\Python\3.13.3\x64\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", 
line 238, in _get_wheel_metadata_from_wheel
       whl_file = os.path.join(metadata_directory, whl_basename)
     File "<frozen ntpath>", line 139, in join
     File "<frozen genericpath>", line 188, in _check_arg_types
   TypeError: join() argument must be str, bytes, or os.PathLike object, 
not 'list'
   error: subprocess-exited-with-error

   Preparing metadata (pyproject.toml) did not run successfully.
   exit code: 1

See 
https://github.com/veusz/veusz/actions/runs/15097383491/job/42433858047 
and https://github.com/veusz/veusz/actions/runs/15096973165/job/42432933475