unable to install word2vec on Ubuntu 18.04.1

[ftk1000]

Tried to install word2vec with and without '-U' flag, with pip and pip3. Keep receiving the same error:

$ pip install word2vec
Collecting word2vec
  Using cached https://files.pythonhosted.org/packages/98/9c/0cc6019be231950235517c29d2d6a2fca76dfa75ad4162ccce22fb1b4364/word2vec-0.9.4.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-zG4Ed2/word2vec/setup.py", line 23, in <module>
        from Cython.Build import cythonize
    ImportError: No module named Cython.Build
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-zG4Ed2/word2vec/

Environment:

$ uname -a
Linux E7440 5.0.0-23-generic #24~18.04.1-Ubuntu SMP Mon Jul 29 16:12:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

$ python --version
Python 2.7.15+

$ python3 --version
Python 3.6.8

[gocen]

I also have the same problem. I've tried
pip install --upgrade setuptools
but nothing changed

[danielfrg]

You need to install Cython first.

pip install cython

will fix it.