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Changelog: Lazy trees (faster Nix builds)
This long-awaited feature makes Nix and flakes dramatically more efficient in a wide range of scenarios
This provides a much more parsimonious mode of operation that should quietly make just about everything in Nix better, from standard package builds to development environments to NixOS deployment and beyond. This specific number isn’t generalizable across all situations, of course, but it does illustrate just how much more efficient Nix can become in a standard scenario when using lazy trees. As an example, check out this CI run, which evaluates the stdenv attribute of Nixpkgs on GitHub Actions’ ubuntu-latest runner.
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