pipenv: Pipenv install fails to install sub dependencies from private repos

Describe you environment

1. OSX (MAC)
2. Python version: 2.7.10
3. Pipenv version: 8.2.6

Issue

1. setup.py inside invocations repo -> installing CaaS package :

install_requires=[
    'CaaS>=1.0'
  ],

  dependency_links=[
    'https://<private_repo>#egg=CaaS-1.0'
  ],

1. Installing invocations in a virtualenv python setup.py install

2. Valdiating CaaS installed correctly.

(test_1) c4b301cf5d25:invocations quj291$ pip freeze
CaaS==1.0

So far everything works.

1. Created a Pipfile

[requires]
python_version = '2.7'

[packages]
invocations = { git = 'git://<private-repo>/invocations',  ref = 'master' }

1. Fails to install invocations because CaaS package cannot be found: pipenv install

Collecting CaaS>=1.0 (from invocations)

  Could not find a version that satisfies the requirement CaaS>=1.0 (from invocations) (from versions: )
No matching distribution found for CaaS>=1.0 (from invocations)

1. Tried pipenv install --verbose

Collecting CaaS>=1.0 (from invocations)
  1 location(s) to search for versions of CaaS:
  * https://pypi.python.org/simple/caas/
  Getting page https://pypi.python.org/simple/caas/
  Looking up "https://pypi.python.org/simple/caas/" in the cache
  No cache entry available
  Starting new HTTPS connection (1): pypi.python.org
  "GET /simple/caas/ HTTP/1.1" 404 33
  Status code 404 not in [200, 203, 300, 301]
  Could not fetch URL https://pypi.python.org/simple/caas/: 404 Client Error: Not Found (caas does not exist) for url: https://pypi.python.org/simple/caas/ - skipping
Cleaning up...

Tries to get CaaS from pypi instead of private github repo’s inside dependency_links of invocation’s setup.py

Is this expected? How can I install CaaS package?

Thanks!