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How the xz backdoor highlights a major flaw in Nix
(shadeyg56.vercel.app)
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this post was submitted on 08 Apr 2024
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Nix & Hydra’s scheduling is super basic. There is room to optimize the builds in many ways. In this case, the fact that xz is in libarchive as well as in input for Nix makes the rebuilds particularly bad.
xz is necessarily in the stdenv. Patching it means rebuilding the world, no matter what you optimise.