Reproducible Python virtual environment using uv and nix
#1387
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This was referenced Jan 22, 2025
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This PR is a draft aimed at producing a reproducible Python virtual environment.
uvseems like the right tool for this because it has a lock file mechanism (but we could alternatively usepoetry), andnixwould be my preferred choice for managing system dependencies (I’m not aware of many alternatives for pinning system dependencies, apart from possibly using a container with a pinned version of Alpine Linux?)This is still a draft, the
shell.nixis currently too convoluted (and ultimately I would like to rather rely on uv2nix), and the goal of this PR is to enable the use of this environment in GitHub Action jobs! Using this setup in CI would help avoid non-reproducible issues, such as this one.n.b. that VLLM is currently broken on NixOS, debugging its derivation might be necessary at some point:
nix-build /nix/var/nix/profiles/per-user/root/channels/nixos/ --run-env -A python3Packages.vllm