• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Ubuntu 19.10
• Poetry version: 1.0.2

Issue

When running poetry install with the pyproject.toml containing a package from a private repository, poetry does install most of the packages from PyPI, but when it comes to installing the private package itself, it fails to install some dependencies:

 Looking in indexes: https://private-repository-url/+simple, https://pypi.org/
 Collecting poetry>=0.12
   ERROR: Could not find a version that satisfies the requirement poetry>=0.12 (from versions: none)

The workaround was to specify the PyPI source in pyproject.toml:

[[tool.poetry.source]]
name = "pypi-repository"
url = "https://pypi.org/simple/"
default = true

So it seems that a possible fix is to add simple/ at the end of PyPI url.