When exporting with a relative package, with develop = true, the requirements.txt file is not created correctly.

pyproject.toml

[tool.poetry.dependencies]
package-name = { path = "../relative/path/to/package-name", develop = true }

requirements.txt with 1.7.1

package-name @ file:///absolute/path/to/package-name ; python_version >= "3.10" and python_version < "4.0"

requirements.txt with 1.8.0

-e file:///absolute/path/to/package-name ; python_version >= "3.10" and python_version < "4.0"

When installing via pip, it does not copy the package files into the target directory. It puts the dist-info folder, and a package_name.pth file.