Simon Willison • 7/14/2026

Using uvx in GitHub Actions in a cache-friendly way

This article explains how to use uvx in GitHub Actions in a cache-friendly way to avoid repeated network requests to PyPI. The author shares a recipe that sets the UV_EXCLUDE_NEWER environment variable to a specific date, which is then used as part of the GitHub Actions cache key. This ensures that the tool is fetched only once and reused from the cache for subsequent runs, with the ability to upgrade by bumping the date. The article also references an existing issue about caching defaults in the astral-sh/setup-uv repository. It is a technical tutorial focused on DevOps and Python tooling in CI/CD.

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#caching #Pypi #Github Actions