The installation-CD profile enables zfs so you can install onto it, but
the pinned nixpkgs ships a broken zfs-kernel that fails to evaluate,
breaking `nix flake check` and ISO builds. Force-disable zfs in the ISO
(a desktop installer doesn't need ZFS-root); use the official NixOS ISO
for ZFS installs.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
