# Static timestamp for channels expected?

**URL:** https://discourse.nixos.org/t/static-timestamp-for-channels-expected/80153
**Category:** Help
**Created:** [September 19, 2026, 8:26pm UTC](https://discourse.nixos.org/t/static-timestamp-for-channels-expected/80153 "2026-09-19T20:26:57Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![573](https://discourse.nixos.org/user_avatar/discourse.nixos.org/573/32/2640_2.png) [@573](https://discourse.nixos.org/u/573)
#### Post date: [September 19, 2026, 8:26pm UTC](https://discourse.nixos.org/t/static-timestamp-for-channels-expected/80153/1 "2026-09-19T20:26:57Z")

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I only noticed today and after some network delays I experienced that the timestamp for the nixpkgs channels seem a bit unusual, for comparison here that workflow run that updated my flake references: [Update flake.lock by github-actions[bot] · Pull Request #60 · 573/nix-config-1 · GitHub](https://github.com/573/nix-config-1/pull/60)

Or is that a regular thing ?

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### Author: ![withakay](https://discourse.nixos.org/letter_avatar_proxy/v4/letter/w/f475e1/32.png) [@withakay](https://discourse.nixos.org/u/withakay)
#### Post date: [September 19, 2026, 9:05pm UTC](https://discourse.nixos.org/t/static-timestamp-for-channels-expected/80153/2 "2026-09-19T21:05:14Z")

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I think this is it:

from [Serving Tarball Flakes - Nix Reference Manual](https://nix.dev/manual/nix/2.25/protocols/tarball-fetcher)

> For tarball flakes, the value of the lastModified flake attribute is defined as the timestamp of the newest file inside the tarball.

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### Author: ![573](https://discourse.nixos.org/user_avatar/discourse.nixos.org/573/32/2640_2.png) [@573](https://discourse.nixos.org/u/573)
#### Post date: [September 20, 2026, 6:59am UTC](https://discourse.nixos.org/t/static-timestamp-for-channels-expected/80153/3 "2026-09-20T06:59:25Z")

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Thanks, you’re right.