• 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: macOS 12.3k
• Poetry version: 1.2.0b3
• Link of a Gist with the contents of your pyproject.toml file:

Issue

Python files generated during a build step (protobufs in my original case) don't make it into the wheel built with poetry build.

I do realize based on previous discussions around here that this particular combo is perhaps somewhat non-standard:

[tool.poetry.build]
generate-setup-file = true
script = "build.py"

I've put together a minimal project to demonstrate the issue at https://github.com/egorchakov/poetry-build-issue. To reproduce:

1. clone the repo:

git clone https://github.com/egorchakov/poetry-build-issue
cd poetry-build-issue

2. build:

make cleanbuild

3. unzip the resulting wheel:

unzip dist/*.whl -d dist/wheel

4. observe that the wheel is missing a file generated during a build step:

 ls dist/wheel/poetry_build_issue/generated