themes/engine/plymouth.nix enables systemd stage-1 initrd
(boot.initrd.systemd.enable) distro-wide, and Plymouth is imported
unconditionally from core/system/default.nix. systemd stage 1 hard-rejects
boot.initrd.postDeviceCommands with a failed assertion, so every config
with nomarchy.system.impermanence.enable = true — including installs that
chose impermanence at the installer prompt — failed to evaluate.
Convert the Erase-Your-Darlings rollback to a boot.initrd.systemd.services
oneshot unit ordered after the LUKS mapping opens and before sysroot.mount,
and add boot.initrd.systemd.initrdBin for btrfs-progs/coreutils/util-linux/
findutils (the systemd initrd doesn't ship them by default). Script body is
unchanged. Verified eval via extendModules on nixosConfigurations.default;
boot-time wipe semantics still need a real wipe-boot cycle (Pillar 8).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Covers: option-already-declared (duplicate mkOption), attribute-missing
(forgot to import nomarchy.nixosModules.system), Stylix target conflict
(needs lib.mkForce, not bare bool), home-manager .hm-bak churn (left over
from backupFileExtension after first install), and impermanence path
missing (dir not in environment.persistence list).
Each entry has the literal error text, the cause, and a copy-paste fix.
Linked from README.md and docs/MIGRATION.md so users hit it before
guessing.
