As recommended by @mbolivar-nordic and... stackoverflow.
While I could not reproduce this locally, this should get rid of many
non-fatal pip errors in CI all looking like this one:
Building wheels for collected packages: PyYAML, progress, psutil, ...
Running setup.py bdist_wheel for PyYAML: started
Running setup.py bdist_wheel for PyYAML: finished with status 'error'
Complete output from command /usr/bin/python3 -u -c "import setuptools,
tokenize;__file__='/tmp/pip-build-b3sj5a6m/PyYAML/setup.py';
f=getattr(tokenize, 'open',open)(__file__);code=f.read().replace(
'\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))"
bdist_wheel -d /tmp/tmpvn0bt6xfpip-wheel- --python-tag cp36:
Failed building wheel for PyYAML
usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
or: -c --help [cmd1 cmd2 ...]
or: -c --help-commands
or: -c cmd --help
error: invalid command 'bdist_wheel'
----------------------------------------
Running setup.py clean for PyYAML
Etc.
Signed-off-by: Marc Herbert <marc.herbert@intel.com>