`poetry build` follows symlink even when excluded in `pyproject.toml`

• 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 20.04

• Poetry version: 1.1.11

• Link of a Gist with the contents of your pyproject.toml file

Issue

The REDACTED/data symlinks to a directory on the machine on a different drive, and poetry complains that the directory path does not start with the same thing as the current project path, when I try to build using poetry build.

1. obviously, because it is located on a different drive
2. it doesn't matter in the first place, because I have excluded this symlink in my pyproject.toml file

[tool.poetry].exclude = ["REDACTED/data/"]

Start by reproducing the issue with the reported Ubuntu 20.04 setup, the REDACTED/data symlink, and the [tool.poetry].exclude entry in pyproject.toml. Trace the poetry build path that processes excluded symlinks and verify that the build completes without resolving the excluded directory; add or update coverage for this case if the project’s existing tests identify a suitable location.