Error starting component with pipenv

When running a microservice I start the infrastructure like:

10:45:43 $ ./start.sh 
Creating network "mdstudio_default" with the default driver
Creating mdstudio_redis_1 ... 
Creating mdstudio_mongo_1 ... 
Creating mdstudio_mongo_1
Creating mdstudio_redis_1 ... done
Creating mdstudio_crossbar_1 ... 
Creating mdstudio_crossbar_1 ... done

Then I use Miniconda3 to run a microservice like:

10:45:54 $ source ~/miniconda3/bin/activate mdstudio3                                                    
(mdstudio3)  10:47:00 $ python -m lie_md
.......
2018-04-04T10:47:23+0200 Crossbar host is: localhost
2018-04-04T10:47:23+0200 Collecting logs on session "MDWampApi"
2018-04-04T10:47:23+0200 Uploaded schemas for MDWampApi
2018-04-04T10:47:23+0200 MDWampApi: 1 procedures successfully registered

And it works as expected. But if I tried exactly the same with pipenv, I get the following results:

10:53:11 $ pipenv install --skip-lock --sequential --two
Virtualenv already exists!
Removing existing virtualenv…
Creating a virtualenv for this project…
Using /usr/bin/python2 (2.7.12) to create virtualenv…
...
Installing dependencies from Pipfile…
  🐍   ▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉ 9/9 — 00:00:22
10:53:46 $ pipenv shell
Loading .env environment variables…
10:55:13 $ pip install lie_md
   Running setup.py install for lie-md ... done
10:56:19 $ export MD_CONFIG_ENVIRONMENTS=dev,docker
10:56:50 $ python -m lie_md                                                                              
2018-04-04T10:57:05+0200 Crossbar host is: localhost
2018-04-04T10:57:05+0200 Collecting logs on session "MDWampApi"
2018-04-04T10:57:05+0200 Unhandled error in Deferred:
  File "/MDStudio/mdstudio/mdstudio/collection/__init__.py", line 15, in getter
    return self[name]
exceptions.KeyError: 'username'

Why is it working with conda and not with pipenv. I'm using python2 with pipenv instead of python 3 due to issue #106

MD-Studio / MDStudio

Error starting component with pipenv #118