Windows で Python の watchdog を入れようとしたらエラーになった

Python Windows log 
(py3) C:\Users\ryosuke\Dropbox\Projects\PyStudy>pip install watchdog
Downloading/unpacking watchdog
  Downloading watchdog-0.7.1.tar.gz (83kB): 83kB downloaded
  Running setup.py egg_info for package watchdog

    no previously-included directories found matching 'docs\source\_themes\.git*'
Downloading/unpacking PyYAML>=3.09 (from watchdog)
  Downloading PyYAML-3.11.tar.gz (248kB): 248kB downloaded
  Running setup.py egg_info for package PyYAML

Downloading/unpacking argh>=0.8.1 (from watchdog)
  Downloading argh-0.24.1.tar.gz
  Running setup.py egg_info for package argh
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
    UnicodeDecodeError: 'cp932' codec can't decode byte 0x94 in position 64: illegal multibyte sequence
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 16, in <module>

UnicodeDecodeError: 'cp932' codec can't decode byte 0x94 in position 64: illegal multibyte sequence

----------------------------------------
Command python setup.py egg_info failed with error code 1 in C:\Users\ryosuke\Projects\py3\build\argh
Storing complete log in C:\Users\ryosuke\pip\pip.log

こちらに対策を書かれている方がいた。ありがたい。でもちょっとエラーの箇所が違うようだ。