# 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:** 3
**Page:** 2

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### Author: ![ada7urhb](https://discourse.nixos.org/letter_avatar_proxy/v4/letter/a/3ab097/32.png) [@ada7urhb](https://discourse.nixos.org/u/ada7urhb)
#### Post date: [July 23, 2025, 9:18am UTC](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685/21 "2025-07-23T09:18:28Z")

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Neither worked and no, not an old out of date machine.

As it was a local machine and fairly powerful I was able to copy across the config and build locally.

Time to look into Colmena I think.

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### Author: ![k0kada](https://discourse.nixos.org/user_avatar/discourse.nixos.org/k0kada/32/12502_2.png) [@k0kada](https://discourse.nixos.org/u/k0kada)
#### Post date: [July 23, 2025, 9:20am UTC](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685/22 "2025-07-23T09:20:14Z")

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> [@ada7urhb](#):
>
> Neither worked and no, not an old out of date machine.

I did test and it should work. Unless you provide logs and more information (like the commit of nixpkgs you’re using) I can’t really help you.

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### Author: ![ada7urhb](https://discourse.nixos.org/letter_avatar_proxy/v4/letter/a/3ab097/32.png) [@ada7urhb](https://discourse.nixos.org/u/ada7urhb)
#### Post date: [July 23, 2025, 10:00am UTC](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685/23 "2025-07-23T10:00:38Z")

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As I mentioned I’ve resolved with a local build in this instance so nothing more to test.

[Previous page](https://discourse.nixos.org/t/nixos-rebuild-issues-after-latest-unstable-upgrade/65685.md?page=1)