# Nixos-rebuild issues after latest unstable upgrade

**URL:** https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685
**Category:** Help
**Created:** [June 15, 2025, 1:57pm UTC](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685 "2025-06-15T13:57:46Z")
**Posts on this page:** 1
**Showing post:** 16

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### Author: ![Shawn8901](https://discourse.nixos.org/user_avatar/discourse.nixos.org/shawn8901/32/6407_2.png) [@Shawn8901](https://discourse.nixos.org/u/Shawn8901)
#### Post date: [June 15, 2025, 6:21pm UTC](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685/16 "2025-06-15T18:21:27Z")

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maybe an additional hint for unstable users.

if you are using unstable you may want to keep regularly an eye on the [Announcements - NixOS Discourse](https://discourse.nixos.org/c/announcements/8) category.

For nixos-rebuild-rebuild-ng the relevant announcement (including the option flip) was [Nixos-rebuild-ng: a nixos-rebuild rewrite](https://discourse.nixos.org/t/nixos-rebuild-ng-a-nixos-rebuild-rewrite/55606)

And there is also [Breaking changes announcement for unstable](https://discourse.nixos.org/t/breaking-changes-announcement-for-unstable/17574) which is a thread to keep an eye on. Sadly not all breaking changes are posted there.

Also [nixpkgs/doc/release-notes at master · NixOS/nixpkgs · GitHub](https://github.com/NixOS/nixpkgs/tree/master/doc/release-notes) contains the “running” release notes for nixpkgs things and [nixpkgs/nixos/doc/manual/release-notes/rl-2511.section.md at 74e468ca541b70961cd629915f8ea6429942088c · NixOS/nixpkgs · GitHub](https://github.com/NixOS/nixpkgs/blob/74e468ca541b70961cd629915f8ea6429942088c/nixos/doc/manual/release-notes/rl-2511.section.md) for nixos things, containing the discussed change here as first item.

I would recomment every unstable user to keep at least a look at the last link (not that as its linking a commit, but the respective nixos changelogs that are edited with the breaking changes) if something breaks unexpected before digging to deep into code or forums.

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_[View the full topic](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685)._