Не могу установить из репозитория

[SEVENID]

$ pip install vk_api
Collecting vk_api
  Downloading https://files.pythonhosted.org/packages/dc/80/843067681acfd2538bec31eeff6e4208c122ab9149d370f285a4ba6464c5/vk_api-11.1.0.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-wjv51bao/vk-api/setup.py", line 16, in <module>
        long_description = f.read()
      File "/usr/lib/python3.6/encodings/ascii.py", line 26, in decode
        return codecs.ascii_decode(input, self.errors)[0]
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 193: ordinal not in range(128)
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-wjv51bao/vk-api/

И почему установлено обязательное использование pip версии 18 и выше?