Can't pipenv install pymssql==2.1.4 into a virtual environment

Question

I was able to pip install pymssql globally but can't get it to install properly with pipenv.

version info:

• pip: 19.1.1
• python: 3.6.8
• pymssql: 2.1.4
• pipenv: 2018.11.26

Here is the error I keep getting:

[pipenv.exceptions.InstallError]:
[
    'Collecting pymssql==2.1.4 (from -r /var/folders/fs/7l0flc8x7tb6hpdj1fz8tvy80000gp/T/pipenv-h6mrvdwf-requirements/pipenv-ihsozeyq-requirement.txt (line 1))',
    'Using cached https://files.pythonhosted.org/packages/2e/81/99562b93d75f3fc5956fa65decfb35b38a4ee97cf93c1d0d3cb799fffb99/pymssql-2.1.4.tar.gz'
]
[pipenv.exceptions.InstallError]:
[
    'ERROR: Complete output from command python setup.py egg_info:',
    'ERROR: /Users/user/.pyenv/versions/3.6.8/envs/local-env/lib/python3.6/site-packages/setuptools/dist.py:42: DistDeprecationWarning: Do not call this function', '      warnings.warn("Do not call this function", DistDeprecationWarning)',
    'Traceback (most recent call last):',
        'File "<string>", line 1, in <module>', 
        'File "/private/var/folders/fs/7l0flc8x7tb6hpdj1fz8tvy80000gp/T/pip-install-x4qssqtr/pymssql/setup.py", line 88, in <module>',
            'from Cython.Distutils import build_ext as _build_ext', 
            "ModuleNotFoundError: No module named 'Cython'", 
    '----------------------------------------',
    'ERROR: Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/fs/7l0flc8x7tb6hpdj1fz8tvy80000gp/T/pip-install-x4qssqtr/pymssql/'
]

Maybe I am missing something here. Any suggestions help.

Thank you in advance.