How do I install designer in a pyside6 conda environment?

The subject line says it all. I have a conda environment with pyside6 installed with conda install pyside6. How do I install Qt Designer? In pyqt5, designer was included, but not with pyside6 or pyqt=6.

Trying to pip install pyqt6-tools like some searches recommended, leads to

Collecting pyqt6-tools
  Using cached pyqt6_tools-6.4.2.3.3-py3-none-any.whl.metadata (8.3 kB)
Collecting click (from pyqt6-tools)
  Using cached click-8.3.1-py3-none-any.whl.metadata (2.6 kB)
Collecting pyqt6==6.4.2 (from pyqt6-tools)
  Using cached PyQt6-6.4.2-cp37-abi3-win_amd64.whl.metadata (2.2 kB)
INFO: pip is looking at multiple versions of pyqt6-tools to determine which version is compatible with other requirements. This could take a while.
Collecting pyqt6-tools
  Using cached pyqt6_tools-6.3.1.3.3-py3-none-any.whl.metadata (8.3 kB)
Collecting pyqt6==6.3.1 (from pyqt6-tools)
  Using cached PyQt6-6.3.1-cp37-abi3-win_amd64.whl.metadata (2.2 kB)
Collecting pyqt6-tools
  Using cached pyqt6_tools-6.1.0.3.2-py3-none-any.whl.metadata (8.3 kB)
Collecting pyqt6==6.1.0 (from pyqt6-tools)
  Using cached PyQt6-6.1.0.tar.gz (946 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [26 lines of output]
      pyproject.toml: line 7: using '[tool.sip.metadata]' to specify the project metadata is deprecated and will be removed in SIP v7.0.0, use '[project]' instead
      Traceback (most recent call last):
        File "C:\Users\xxxx\.conda\envs\pyside6-env\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 389, in <module>
          main()
        File "C:\Users\xxxx\.conda\envs\pyside6-env\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:\Users\xxxx\.conda\envs\pyside6-env\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 178, in prepare_metadata_for_build_wheel
          whl_basename = backend.build_wheel(metadata_directory, config_settings)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "C:\Users\xxxx\AppData\Local\Temp\pip-build-env-z39yg75t\overlay\Lib\site-packages\sipbuild\api.py", line 28, in build_wheel
          project = AbstractProject.bootstrap('wheel',
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "C:\Users\xxxx\AppData\Local\Temp\pip-build-env-z39yg75t\overlay\Lib\site-packages\sipbuild\abstract_project.py", line 74, in bootstrap
          project.setup(pyproject, tool, tool_description)
        File "C:\Users\xxxx\AppData\Local\Temp\pip-build-env-z39yg75t\overlay\Lib\site-packages\sipbuild\project.py", line 661, in setup
          self.apply_user_defaults(tool)
        File "C:\Users\xxxx\AppData\Local\Temp\pip-install-igf2bz96\pyqt6_73d57a6cf0b44780a97c7c1c3d89a74a\project.py", line 60, in apply_user_defaults
          super().apply_user_defaults(tool)
        File "C:\Users\xxxx\AppData\Local\Temp\pip-build-env-z39yg75t\overlay\Lib\site-packages\pyqtbuild\project.py", line 51, in apply_user_defaults
          super().apply_user_defaults(tool)
        File "C:\Users\xxxx\AppData\Local\Temp\pip-build-env-z39yg75t\overlay\Lib\site-packages\sipbuild\project.py", line 248, in apply_user_defaults
          self.builder.apply_user_defaults(tool)
        File "C:\Users\xxxx\AppData\Local\Temp\pip-build-env-z39yg75t\overlay\Lib\site-packages\pyqtbuild\builder.py", line 49, in apply_user_defaults
          raise PyProjectOptionException('qmake',
      sipbuild.pyproject.PyProjectOptionException
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> pyqt6

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

Thanks.

A little followup. I went and created a bare- bones conda environment with my desired python version.

Then pip install pyqt6. No problem.

Then pip install pyqt6-tools. Same type of error as before. :smiling_face_with_tear:

According to pyqt6-tools · PyPI

This only goes to python 3.9!

So it turns out that if I pip install pyside6 instead of conda install pyside6 in my conda environment, I can run pyside6-designer.exe.