Question: Errors are present when trying to install PyQt5 via pip3. The automated message wants me to add more detail, but I don't have any. All the detail is in the code.  ➜ ~ pip3 install PyQt5 --user Collecting PyQt5 Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f2c97cfeb50>: Failed to establish a new connection: [Er rno -2] Name or service not known')': /simple/pyqt5/ Using cached https://files.pythonhosted.org/packages/3a/fb/eb51731f2dc7c22d8e1a63ba88fb702727b324c6352183a32f27f73b8116/PyQt5-5.14.1.tar.gz Installing build dependencies ... done Getting requirements to build wheel ... done Preparing wheel metadata ... error Complete output from command /usr/bin/python3 /usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp3yjy_ooq: Traceback (most recent call last): File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 64, in prepare_metadata_for_build_wheel hook = backend.prepare_metadata_for_build_wheel AttributeError: module 'sipbuild.api' has no attribute 'prepare_metadata_for_build_wheel' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 207, in <module> main() File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 197, in main json_out['return_val'] = hook(**hook_input['kwargs']) File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 67, in prepare_metadata_for_build_wheel config_settings) File "/usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 95, in _get_wheel_metadata_from_wheel whl_basename = backend.build_wheel(metadata_directory, config_settings) File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/api.py", line 51, in build_wheel project = AbstractProject.bootstrap('pep517') File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/abstract_project.py", line 82, in bootstrap project.setup(pyproject, tool, tool_description) File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/project.py", line 387, in setup self.apply_user_defaults(tool) File "project.py", line 62, in apply_user_defaults super().apply_user_defaults(tool) File "/tmp/pip-build-env-1ms8fm3e/overlay/lib/python3.7/site-packages/pyqtbuild/project.py", line 86, in apply_user_defaults super().apply_user_defaults(tool) File "/tmp/pip-build-env-1ms8fm3e/overlay/lib64/python3.7/site-packages/sipbuild/project.py", line 202, in apply_user_defaults self.builder.apply_user_defaults(tool) File "/tmp/pip-build-env-1ms8fm3e/overlay/lib/python3.7/site-packages/pyqtbuild/builder.py", line 68, in apply_user_defaults "specify a working qmake or add it to PATH") sipbuild.pyproject.PyProjectOptionException ---------------------------------------- Command "/usr/bin/python3 /usr/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp3yjy_ooq" failed with error code 1 in /tmp/pip-install-6w4gkbyk/PyQt5  Tried installing Qt directly, in order to get QMake in path, but to no avail. ➜ ~ qmake --version QMake version 2.01a Using Qt version 4.8.7 in /usr/lib64 ➜ ~  OS information (Fedora 30)  5.2.11-200.fc30.x86_64 #1 SMP Thu Aug 29 12:43:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux  More versions ➜ ~ pip3 --version pip 19.0.3 from /usr/lib/python3.7/site-packages/pip (python 3.7) ➜ ~ python3 --version Python 3.7.5 ➜ ~ 

Answer: I had the same error installing tensorflow. Upgrading "setuptools" and "pip" to the latest minor version worked for me.