[Python] SST Python Lambda Deployment Error "No pyproject.toml found"

I'm trying to deploy an SST v3 application with a Python Lambda function for data clustering, I have two TypeScript Lambdas that are working correctly but the Python Lambda is constantly getting this error:

Build Error packages/python_functions/src/clustering.handler
↳ failed to run uv sync: exit status 2
error: No `pyproject.toml` found in current directory or any parent directory


I have tried placing the pyproject.toml file in different locations (project root, packages/python_functions and packages/python_functions/src). I have tried using requirements.txt file instead of the pyproject.toml file but get the same error.

Here is the relevant code in the sst config file:

clusteringQueue.subscribe({
handler: "packages/python_functions/src/clustering.handler",
timeout: "10 minutes",
runtime: "python3.11",
environment: {
SUPABASE_URL: process.env.SUPABASE_URL!,
SUPABASE_SERVICE_ROLE_KEY: process.env.SUPABASE_SERVICE_ROLE_KEY!,
OPENAI_API_KEY: process.env.OPENAI_API_KEY!,
},
});


How can I properly configure SST v3 to recognise and use the Python dependencies in my pyproject.toml when deploying this Lambda function?

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