Found by running the unattended install in an offline QEMU VM:
- compgen is missing from nixpkgs' non-interactive bash (the package
shebang) — replaced with plain glob tests in hardware-db and prewipe
- disko's eval resolves <nixpkgs> via NIX_PATH (a dead channel on the
ISO) and tried channels.nixos.org — export NIX_PATH to the pinned
nixpkgs source and point the flake registry at an empty baked file
- lock nomarchy by path (the source the ISO carries) instead of
git+https: git inputs clone even when narHash is known, which kills
offline installs; `original` keeps the forge URL so a later
`nix flake update` re-resolves normally. Works from dirty-tree ISOs too.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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