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Release notes for builtins.nixVersion change

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Change-Id: I72c945cab464d26d73f5594ef0a4bb2184545da4
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jade 2024-03-18 18:26:52 -07:00
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synopsis: "`builtins.nixVersion` now returns a fixed value \"2.18.3-lix\""
# prs: cl 558
---
`builtins.nixVersion` now returns a fixed value `"2.18.3-lix"`. This prevents
feature detection assuming that features that exist in Nix post-Lix-branch-off
might exist, even though the Lix version is greater than the Nix version.
In the future, check for builtins for feature detection. If a feature cannot be
detected by *those* means, please file a Lix bug.