nanuqsaurus/docs/secure-boot.md
2026-02-01 20:12:00 +02:00

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# Secure Boot after installing
The installer ISO still requires Secure Boot *off* to boot. After installation you can enable Secure Boot on the installed system using Lanzaboote.
Steps (per host):
1) In `flake.nix` inputs, keep `lanzaboote.url = "github:nix-community/lanzaboote";` (already present).
2) In your host module (e.g. `hosts/<hostname>.nix`), add imports:
- `inputs.lanzaboote.nixosModules.lanzaboote`
- `../modules/system/secure-boot.nix`
3) Rebuild on the target system (with Secure Boot still disabled):
`sudo nixos-rebuild switch --flake .#<hostname>`
4) Reboot once more to let Lanzaboote enroll keys; youll see a brief enrollment phase via systemd-boot.
5) Enter firmware setup and re-enable Secure Boot. Boot should now succeed with the signed UKI.
Notes
- Keys are stored at `/var/lib/secureboot` (persist this if you use impermanence).
- Microsoft keys are included for compatibility; adjust in `secure-boot.nix` if you want fully custom trust.
- If you regenerate keys, re-run the rebuild and reboot before toggling firmware settings.