$ python -c 'import mozrunner;'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "c:\mozilla-build\python\lib\site-packages\mozrunner\__init__.py", line 4
8, in <module>
    import killableprocess
  File "c:\mozilla-build\python\lib\site-packages\mozrunner\killableprocess.py",
 line 75, in <module>
    import winprocess
  File "c:\mozilla-build\python\lib\site-packages\mozrunner\winprocess.py", line
 249, in <module>
    IsProcessInJobFlags)
AttributeError: function 'IsProcessInJob' not found