@Marvin I defined environment variables in my GitHub Action workflow

- name: Run Prefect Deploy
        uses: PrefectHQ/actions-prefect-deploy@v4.2.0
        with:
          deployment-names: deployment
          deployment-file-path: prefect.yaml
        env:
          TOOL_KEY: XXX

How to read the TOOL_KEY value in my Python flow? I tried

os.getenv("TOOL_KEY")

but it doesn't work

To access an environment variable like

TOOL_KEY

in your Prefect flow, you should indeed use

os.getenv("TOOL_KEY")

. However, if it doesn't work, there might be a few reasons: 1. Environment Variable Scope: Ensure that the environment variable is accessible in the context where your Prefect flow is executed. It's possible that the environment variable is set in the GitHub Actions environment but not being passed down to the Prefect flow runtime environment. 2. Execution Environment: If your flow is running in a different environment (e.g., a Docker container or a remote agent), make sure the environment variable is available in that context. 3. Prefect Settings: Prefect settings can be configured using environment variables prefixed with

PREFECT_

. However, your custom environment variable

TOOL_KEY

should still be accessible if properly set in the execution environment. Here's a checklist: - Double-check that

TOOL_KEY

is set correctly in the environment where the flow runs. - If using Docker or a similar isolated environment, ensure

TOOL_KEY

is set within that environment. For more details on environment variables in Prefect, you can refer to the Prefect documentation on environment variables. If the issue persists, consider adding debugging statements in your flow to print all environment variables and verify the presence of

TOOL_KEY

.