The last lines of pip.log
Similar topics did not help
status = self.run(options, args)
File “/usr/lib/python3/dist-packages/pip/commands/install.py”, line 283, in run
requirement_set.install(install_options, global_options, root=options.root_path)
File “/usr/lib/python3/dist-packages/pip/req.py”, line 1436, in install
requirement.install(install_options, global_options, *args, **kwargs)
File “/usr/lib/python3/dist-packages/pip/req.py”, line 707, in install
cwd=self.source_dir, filter_stdout=self._filter_install, show_stdout=False)
File “/usr/lib/python3/dist-packages/pip/util.py”, line 715, in call_subprocess
% (command_desc, proc.returncode, cwd))
pip.exceptions.InstallationError: Command /usr/bin/python3 -c “import setuptools, tokenize;file=’/tmp/pip_build_root/cffi/setup.py’;exec(compile(getattr(tokenize, ‘open’, open)(file).read().replace(’\r\n’, ‘\n’), file, ‘exec’))” install --record /tmp/pip-dougo75d-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/cffi