@freya I am trying out #ZFS on my "homelab" server but was most surprised that it seems one has to do all the ZFS setup external to the #flake which only lives within the manually made ZFS pool environment. That seems to mean I need a sort of orchestration script like tool to match flake /persist data settings (am using #impermanence lite currently) to the ZFS setup hoo-ha. Works fine but is not declarative #nixos at all really. Any ideas there ?

Solution in #nixos #flake for machine ThinkPad #x230 seems to be:
services.xserver.enable = true;
services.displayManager.gdm.enable = true;
services.desktopManager.gnome.enable = true;
services.desktopManager.gnome.flashback.enableMetacity = true;
# At the GDM login screen, click the gear # icon to choose between:
# - "GNOME" (Wayland)
# - "GNOME Flashback (Metacity)" #X11
and
nixos-rebuild boot + reboot is required (not switch) when jumping across major nixpkgs versions

@stadtkind @edwtjo Thanks for the input. FYI this is my playbook for this #git #nixos #flake synch / reconciliation process when two flakes have deviated and you want to make them the same by using a repo, e.g. codeberg , as the single source of truth. The solution uses the branch main on the main computer which has the main flake that should be up to date always, & a branch on the other machine named after the machine. The other machine will always commit to its branch https://codeberg.org/adingbatponder/reticulum_nixos_flake/src/branch/main/docs/git-flake-reconciliation.md