From https://build.chromium.org/p/chromium.fyi/builders/ClangToTWin64%20tester/builds/7994:


error in RunProcess._startCommand
Traceback (most recent call last):
  File "E:\b\build\third_party\buildbot_slave_8_4\buildslave\runprocess.py", line 379, in start
    self._startCommand()
  File "E:\b\build\third_party\buildbot_slave_8_4\buildslave\runprocess.py", line 499, in _startCommand
    usePTY=self.usePTY)
  File "E:\b\build\third_party\buildbot_slave_8_4\buildslave\runprocess.py", line 525, in _spawnProcess
    path, usePTY=usePTY)
  File "E:\b\build\third_party\twisted_10_2\twisted\internet\posixbase.py", line 335, in spawnProcess
    raise NotImplementedError, "spawnProcess not available since pywin32 is not installed."
NotImplementedError: spawnProcess not available since pywin32 is not installed.


I'm not seeing that on any of the other bots, so it must be something wrong with that VM.

Infra folks: can you take a look?