A few weeks ago I ran nix flake update to get the latest versions of CLI tools that I regularly use from nixos-unstable.
atuin is one of those tools which I started using relatively recently and quickly became a huge fan of.
I run it on all of my machines, and I can’t overstate how amazing it ...
After learning how to add an unstable overlay to nixpkgs, being able to override individual service modules from unstable was something that I still struggled with until fairly recently. Hopefully this helps someone else looking to do common-but-not-very-obvious operation.
I've had it in the past where I can specify in the package name (like pkgs.unstable.chromium). You'll be able to do the same with service options as most allow you to set the package they use with a config option
Yeah this is usually the way to go, I think I just got unlucky that this particular service on nixos-23.11 doesn't have a package override option (but it will have in nixos-24.x releases!)