Env variable in pipfile (package section) not working

[julste]

I'm trying to install a package via Pipfile from a private repo. I have already asked for help on stackoverflow.

#3882 # Issue description

Using the following syntax, VScode is asking for a password (in console it is locking forever), although my token is exported to my env variables:

[packages]
pack1 = {editable = true, git = "https://${ACCESS_TOKEN}@github.com/.../pack1.git"}

Using the ACCESS_TOKEN directly it works like expected:

[packages]
pack1 = {editable = true, git = "https://myToken@github.com/.../pack1.git"}

Using pipenv install command works also fine with my environment variable (ACCESS_TOKEN):

pipenv install -e git+https://${ACCESS_TOKEN}@github.com/.../pack1.git

---

$ pipenv --support

Pipenv version: '2020.11.4'

Pipenv location: '/home/.../.local/lib/python3.7/site-packages/pipenv'

Python location: '/usr/bin/python3'

Python installations found:

• 3.7.5: /usr/bin/python3
• 3.7.5: /usr/bin/python3.7
• 3.7.5: /usr/bin/python3.7m

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.7.5',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '5.3.0-64-generic',
 'platform_system': 'Linux',
 'platform_version': '#58-Ubuntu SMP Fri Jul 10 19:33:51 UTC 2020',
 'python_full_version': '3.7.5',
 'python_version': '3.7',
 'sys_platform': 'linux'}

[frostming]

Duplicate with #4038 #3516