VCS Installations Do not get installed on master

[techalchemy]

On master, VCS installs don't currently actually land in the target virtualenv despite resolving correctly:

 ³ tempenv-0b99134292895  /t/test  pipenv install -e git+https://github.com/benjaminp/six.git@15e31431af97e5e64b80af0a3f598d382bcdd49a#egg=six
Creating a virtualenv for this project…
Pipfile: /tmp/test/Pipfile
Using /home/hawk/.virtualenvs/tempenv-0b99134292895/bin/python3.7 (3.7.3) to create virtualenv…
⠇ Creating virtual environment...Already using interpreter /home/hawk/.virtualenvs/tempenv-0b99134292895/bin/python3.7
Using real prefix '/home/hawk/.pyenv/versions/3.7.3'
New python executable in /home/hawk/.virtualenvs/test-hxkKlP5o/bin/python3.7
Also creating executable in /home/hawk/.virtualenvs/test-hxkKlP5o/bin/python
Installing setuptools, pip, wheel...
done.
Running virtualenv with interpreter /home/hawk/.virtualenvs/tempenv-0b99134292895/bin/python3.7

✔ Successfully created virtual environment! 
Virtualenv location: /home/hawk/.virtualenvs/test-hxkKlP5o
Creating a Pipfile for this project…
Installing -e git+https://github.com/benjaminp/six.git@15e31431af97e5e64b80af0a3f598d382bcdd49a#egg=six…
Adding six to Pipfile's [packages]…
✔ Installation Succeeded 
Pipfile.lock not found, creating…
Locking [dev-packages] dependencies…
Locking [packages] dependencies…
Building requirements...
Resolving dependencies...
✔ Success! 
Updated Pipfile.lock (68c7e2)!
Installing dependencies from Pipfile.lock (68c7e2)…
  🐍   ▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉ 1/1 — 00:00:01
To activate this project's virtualenv, run pipenv shell.
Alternatively, run a command inside the virtualenv with pipenv run.
  ³ tempenv-0b99134292895  /t/test  pipenv run pip freeze
  ³ tempenv-0b99134292895  /t/test 