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Try a buggy kernel and breaking your network in one `nixos-rebuild switch`, garbage-collecting older working generations and trying to fix your config back into

Try a buggy kernel and breaking your network in one `nixos-rebuild switch`, garbage-collecting older working generations and trying to fix your config back into working state. Great fun. Other than that, NixOS is a godsend.

colordrops 4y ago
Why would you garbage-collect older working generations without testing whether the latest works. You'd have to go out of your way to do that, and it goes against the entire purpose of it.
- ZoomZoomZoom 4y ago
  Not every bug manifests itself right after reboot. You can easily have a bunch of generations you just think are ok. The point is entirely different: if you update the channel-list you need the network for any changes to the configuration and I don't know of a way to go back to an earlier channel state.
  - colordrops 4y ago
    Once again, why wouldn't you keep the last few generations around? No network is required to use them.
    - ZoomZoomZoom 4y ago
      Answering your question: ENOSPC This is not a support forum and we're not trying to diagnose and fix someone's issue. It's just not that hard to get into trouble with NixOS and there's still a room for improvement, that's all. Reading on `nix-channel --rollback`, it should definitely help in some cases and I don't know how I missed it, maybe the docs weren't clear it's not tied to config generations or I just didn't pay enough attention.
  - rgoulter 4y ago
    > The point is entirely different: if you update the channel-list you need the network for any changes to the configuration and I don't know of a way to go back to an earlier channel state. `nix-channel` does have a `--rollback` flag to it. However, I feel that Nix Flakes would allow you a better experience. With nix flakes, the revision of the nixpkgs input is persisted in a lockfile. You could check this file in somewhere, and then getting your working directory back to a known working state is much easier.
  - throwamon 4y ago
    > You can easily have a bunch of generations you just think are ok. Unless you erase your darlings: https://grahamc.com/blog/erase-your-darlings https://grahamc.com/blog/erase-your-darlings
anotherhue 4y ago
I find switch to be a bad idea, better to build a new generation and reboot into it. Less inconsistency.
anthk 4y ago
You can set Pop OS' themes under Nix based GNOME desktop with ease.

colordrops 4y ago

Why would you garbage-collect older working generations without testing whether the latest works. You'd have to go out of your way to do that, and it goes against the entire purpose of it.

ZoomZoomZoom 4y ago
Not every bug manifests itself right after reboot. You can easily have a bunch of generations you just think are ok. The point is entirely different: if you update the channel-list you need the network for any changes to the configuration and I don't know of a way to go back to an earlier channel state.
- colordrops 4y ago
  Once again, why wouldn't you keep the last few generations around? No network is required to use them.
  - ZoomZoomZoom 4y ago
    Answering your question: ENOSPC This is not a support forum and we're not trying to diagnose and fix someone's issue. It's just not that hard to get into trouble with NixOS and there's still a room for improvement, that's all. Reading on `nix-channel --rollback`, it should definitely help in some cases and I don't know how I missed it, maybe the docs weren't clear it's not tied to config generations or I just didn't pay enough attention.
- rgoulter 4y ago
  > The point is entirely different: if you update the channel-list you need the network for any changes to the configuration and I don't know of a way to go back to an earlier channel state. `nix-channel` does have a `--rollback` flag to it. However, I feel that Nix Flakes would allow you a better experience. With nix flakes, the revision of the nixpkgs input is persisted in a lockfile. You could check this file in somewhere, and then getting your working directory back to a known working state is much easier.
- throwamon 4y ago
  > You can easily have a bunch of generations you just think are ok. Unless you erase your darlings: https://grahamc.com/blog/erase-your-darlings https://grahamc.com/blog/erase-your-darlings

anotherhue 4y ago

I find switch to be a bad idea, better to build a new generation and reboot into it. Less inconsistency.

anthk 4y ago

You can set Pop OS' themes under Nix based GNOME desktop with ease.