Poetry + Tox install local packages or git packages

[incoggnito]

This is my current tox config:

[testenv]
commands =
    poetry install -v
    poetry run pytest --cov
deps = poetry
description = Test Python code.

[testenv:lint]
commands =
    poetry install -v
    poetry run bandit -ilr src
    poetry run black --check .
    poetry run python scripts/docs.py build
    poetry run flakehell scripts src tests
    poetry run mypy scripts src tests
deps = poetry
description = Run static analyzers on Python code.

[tox]
envlist = lint, py37, py38, py39
isolated_build = true

[tox:.package]
basepython = python3.8

The individual commands work in my virtual environment with poetry.
But i use a local package in my development, that is not deployed to pypi.

When i run tox it does not find the local package...
Should I install the local package from my githost? Is this even possible?
I guess for the gitlab-ci worflow i will need this too...

Thanks for any advice!