• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate. (there are similar but not specific)
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option). (No exception occurs)

• OS version and name: Ubuntu 18.04, 20.04, Debian (from Python 3.8.2 Docker Image)
• Poetry version: 1.0.7
• Link of a Gist with the contents of your pyproject.toml file: Not allowed to sorry, (Work Defined Rule).

Issue

When using dependencies defined as git based repositories poetry reports that it installs the repository but when we source the poetry created virtual environment and try to run unit tests or an interactive terminal we are unable to find the package poetry reported as installed.