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fix(nix): run tzdata now.ck at the release timestamp - #2659

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fix/tzdata-check-timestamp
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brainrake wants to merge 2 commits into
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fix/tzdata-check-timestamp

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@brainrake brainrake commented Nov 13, 2026 •

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The tzdata 2026f now.ck check fails for builds after 2026-11-01. BC, Alberta, and Manitoba became permanent-offset, so their zonenow.tab rows are identical to Phoenix, Mexico_City, and Jamaica.

This sets CHECK_NOW_TIMESTAMP to the release time in the tzdata overlay's preCheck. It is the same fix as NixOS/nixpkgs#582577, which is on staging and staging-26.05 but not in a channel yet.

Remove the override once the pinned nixpkgs includes that PR.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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brainrake marked this pull request as ready for review November 13, 2026 20:02
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brainrake requested a review from a team as a code owner November 13, 2026 20:02
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brainrake requested a review from mmlb November 13, 2026 20:03
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