Tox: fails check-manifest on appveyor for py2.7

[Borda]

After upgrading to 3.10.0 check-manifest fails for python 2.7 on a simple project

py27 run-test: commands[0] | check-manifest --ignore 'tox.ini,tests*'
lists of files in version control and sdist do not match!
missing from VCS:
  .

https://ci.appveyor.com/project/Borda/py-sample-project/builds/24544230/job/3977lvvbaxx9a223
I was also testing (rebuild) previously passing commit and it fails also; downgrading to 3.9.0 also solves the issue

[gaborbernat]

please install tox with force reinstall flag of pip 😀 Appveyor ships with a horrible old virtualenv by default.

[Borda]

@gaborbernat I have upgraded pip before installing tox, but the result was the same...

[gaborbernat]

I'm not talking about upgrading pip, I'm talking about upgrading all tox dependencies (via the force reinstall flag).

[Borda]

pip install -U --force-reinstall tox