Error: "The Poetry configuration is invalid: project must contain ['name'] properties" when installing label-studio-ml-backend

[AnggaDS01]

Describe the bug
I encountered an error while trying to install label-studio-ml-backend using pip install -e .. The installation fails due to a dependency issue with label-studio-sdk, where the Poetry configuration in pyproject.toml seems to be invalid. This error prevents me from proceeding with creating a custom ML backend using the label-studio-ml create my_ml_backend command.

To Reproduce
Steps to reproduce the behavior:

1. Clone the label-studio-ml-backend repository:

git clone https://github.com/HumanSignal/label-studio-ml-backend.git
cd label-studio-ml-backend

2. Run the installation command:

pip install -e .

3. The installation fails with the following error:

(label_studio) anggads_01@DESKTOP-O2G4H9A:~/Workspace/Label_Studio/label-studio-ml-backend$ pip install -e .
Obtaining file:///home/anggads_01/Workspace/Label_Studio/label-studio-ml-backend
  Preparing metadata (setup.py) ... done
Collecting label-studio-sdk@ git+https://github.com/HumanSignal/label-studio-sdk.git (from label-studio-ml==2.0.1.dev0)
  Cloning https://github.com/HumanSignal/label-studio-sdk.git to /tmp/pip-install-36mai0aw/label-studio-sdk_8fbbfcce2dba4318bea85860eec6795f
  Running command git clone --filter=blob:none --quiet https://github.com/HumanSignal/label-studio-sdk.git /tmp/pip-install-36mai0aw/label-studio-sdk_8fbbfcce2dba4318bea85860eec6795f
  Resolved https://github.com/HumanSignal/label-studio-sdk.git to commit 3ea3e9b7582d483419007e608b79662c1ef9b948
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... error
  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [14 lines of output]
      Traceback (most recent call last):
        File "/home/anggads_01/miniconda3/envs/label_studio/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/home/anggads_01/miniconda3/envs/label_studio/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/home/anggads_01/miniconda3/envs/label_studio/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 149, in prepare_metadata_for_build_wheel
          return hook(metadata_directory, config_settings)
        File "/tmp/pip-build-env-gq8_lkss/overlay/lib/python3.9/site-packages/poetry/core/masonry/api.py", line 42, in prepare_metadata_for_build_wheel
          poetry = Factory().create_poetry(Path().resolve(), with_groups=False)
        File "/tmp/pip-build-env-gq8_lkss/overlay/lib/python3.9/site-packages/poetry/core/factory.py", line 58, in create_poetry
          raise RuntimeError("The Poetry configuration is invalid:\n" + message)
      RuntimeError: The Poetry configuration is invalid:
        - project must contain ['name'] properties
      
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.

Expected behavior
The installation should succeed, allowing me to proceed with creating a custom ML backend using:

label-studio-ml create my_ml_backend

Screenshots

Environment:

• OS: Ubuntu 24.04 (using WSL2)
• Label Studio Version 1.15.0
• Python Version: 3.9.7 (Miniconda)
• Pip Version: 24.2

Additional context
This issue is likely caused by the pyproject.toml file in the label-studio-sdk repository missing the required name property under [tool.poetry]. Without this property, Poetry cannot generate metadata, leading to the error.

[jombooth]

Hi @AnggaDS01 - thanks for raising! This issue seems to be caused by a breaking change in the latest version of poetry-core and we are working on a fix.

[jombooth]

This should be fixed now (in HumanSignal/label-studio-sdk#382)

[holdenweb]

Was this regarded as fixed on 2.0.1, or do I need to wait for a further release?

The really weird thing for me is that the project builds fine until I add

[project.scripts]
tagsetdemo = "tagset.demo:main"

to my pyproject.toml, whereupon I see the same error already reported.