Installing from source gives UnicodeDecodeError #129

$ docker run -it --rm centos:7 bash
# yum install -y epel-release
...
# yum install -y python36-pip
...
# pip3.6 install --no-binary :all: rsa
Collecting rsa
  Downloading https://files.pythonhosted.org/packages/cb/d0/8f99b91432a60ca4b1cd478fd0bdf28c1901c58e3a9f14f4ba3dba86b57f/rsa-4.0.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-build-oh4v54vc/rsa/setup.py", line 20, in <module>
        long_description = f.read()
      File "/usr/lib64/python3.6/encodings/ascii.py", line 26, in decode
        return codecs.ascii_decode(input, self.errors)[0]
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 898: ordinal not in range(128)

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-oh4v54vc/rsa/
You are using pip version 8.1.2, however version 19.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.