Recommended way to upgrade k3s?

Hello everyone.

I have a working k3s cluster using NixOS 22.05. Now of course I need to upgrade to NixOS 22.11. However, I want to follow recommended upgrade instructions.

Before we begin, to understand the problem, I think it’s important to have a look at Version Skew Policy | Kubernetes

Summarizing, to have a successful cluster upgrade, you need to:

  1. Upgrade your server nodes to the latest patch version available. One node at a time.
  2. Do the same operation with worker nodes, in no particular order.
  3. Repeat steps 1-2, but this time upgrading to the latest patch version in the next minor version.
  4. Repeat step 3 until reached the desired minor version.

Which, in this particular context, and bearing in mind current releases as of today, translates to:

  1. Upgrade servers to Release v1.23.14+k3s1 · k3s-io/k3s · GitHub
  2. Upgrade workers to that version.
  3. Upgrade servers to Release v1.24.8+k3s1 · k3s-io/k3s · GitHub
  4. Upgrade workers to that version.
  5. Upgrade servers to Release v1.25.4+k3s1 · k3s-io/k3s · GitHub
  6. Upgrade workers to that version.

However, latest k3s in NixOS 22.05 is 1.23.10+k3s1 and in Nixos 22.11 is 1.25.3+k3s1. There’s no 1.24.x version available AFAICS.

So I’m a bit puzzled. How am I supposed to apply recommended upgrade methods using NixOS? Since k3s is such a specific piece, would it make sense to have a separate repo that packages all releases for NixOS, so it can be overlaid on any version?