'vcvarsall.bat' missing 'path' key

[tseaver]

Breaks buildnig extension (zope.index, zope.i18nmessageid):

Traceback (most recent call last):
  File "c:\temp\tmppmotut", line 14, in <module>
    exec(compile(f.read(), 'c:\\buildslave\\zope.i18nmessageid_py_270_win64\\build\\.\\setup.py', 'exec'))
  File "c:\buildslave\zope.i18nmessageid_py_270_win64\build\.\setup.py", line 136, in <module>
    **extra
  File "c:\Python27_64\lib\distutils\core.py", line 151, in setup
    dist.run_commands()
  File "c:\Python27_64\lib\distutils\dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "c:\Python27_64\lib\distutils\dist.py", line 972, in run_command
    cmd_obj.run()
  File "build\bdist.win32\egg\setuptools\command\develop.py", line 34, in run
  File "build\bdist.win32\egg\setuptools\command\develop.py", line 119, in install_for_development
  File "c:\Python27_64\lib\distutils\cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "c:\Python27_64\lib\distutils\dist.py", line 972, in run_command
    cmd_obj.run()
  File "c:\buildslave\zope.i18nmessageid_py_270_win64\build\.\setup.py", line 67, in run
    build_ext.run(self)
  File "c:\Python27_64\lib\distutils\command\build_ext.py", line 339, in run
    self.build_extensions()
  File "c:\Python27_64\lib\distutils\command\build_ext.py", line 448, in build_extensions
    self.build_extension(ext)
  File "c:\buildslave\zope.i18nmessageid_py_270_win64\build\.\setup.py", line 76, in build_extension
    build_ext.build_extension(self, ext)
  File "c:\Python27_64\lib\distutils\command\build_ext.py", line 498, in build_extension
    depends=ext.depends)
  File "c:\Python27_64\lib\distutils\msvc9compiler.py", line 473, in compile
    self.initialize()
  File "c:\Python27_64\lib\distutils\msvc9compiler.py", line 383, in initialize
    vc_env = query_vcvarsall(VERSION, plat_spec)
  File "build\bdist.win32\egg\setuptools\msvc9_support.py", line 52, in query_vcvarsall
  File "c:\Python27_64\lib\distutils\msvc9compiler.py", line 299, in query_vcvarsall
    raise ValueError(str(list(result.keys())))
ValueError: [u'path']
While:
  Installing.
  Processing develop directory 'c:\\buildslave\\zope.i18nmessageid_py_270_win64\\build\\.'.

[agroszer]

yep, gotta find some time to debug...