(base)  conda install -c conda-forge pyqt
Collecting package metadata (current_repodata.json): failed

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://conda.anaconda.org/conda-forge/linux-aarch64/current_repodata.json>
Elapsed: -

An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
'https//conda.anaconda.org/conda-forge/linux-aarch64'

(base) pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pyqt5 pyqt5-tools
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting pyqt5
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/0e/07/c9ed0bd428df6f87183fca565a79fee19fa7c88c7f00a7f011ab4379e77a/PyQt5-5.15.11.tar.gz (3.2 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3.2/3.2 MB 1.4 MB/s eta 0:00:00
  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
  ╰─> [27 lines of output]
      Querying qmake about your Qt installation...
      Traceback (most recent call last):
        File "/usr/local/miniconda3/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/usr/local/miniconda3/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/usr/local/miniconda3/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 152, in prepare_metadata_for_build_wheel
          whl_basename = backend.build_wheel(metadata_directory, config_settings)
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/sipbuild/api.py", line 28, in build_wheel
          project = AbstractProject.bootstrap('wheel',
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/sipbuild/abstract_project.py", line 74, in bootstrap
          project.setup(pyproject, tool, tool_description)
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/sipbuild/project.py", line 608, in setup
          self.apply_user_defaults(tool)
        File "project.py", line 68, in apply_user_defaults
          super().apply_user_defaults(tool)
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/pyqtbuild/project.py", line 51, in apply_user_defaults
          super().apply_user_defaults(tool)
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/sipbuild/project.py", line 237, in apply_user_defaults
          self.builder.apply_user_defaults(tool)
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/pyqtbuild/builder.py", line 59, in apply_user_defaults
          self._get_qt_configuration()
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/pyqtbuild/builder.py", line 478, in _get_qt_configuration
          for line in project.read_command_pipe([self.qmake, '-query']):
        File "/tmp/pip-build-env-eux7k9ds/overlay/lib/python3.9/site-packages/sipbuild/project.py", line 575, in read_command_pipe
          raise UserException(
      sipbuild.exceptions.UserException
      [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.
╰─> See above for output.

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