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Nomarchy/templates/downstream/system.nix
Bernardo Magri 7aae204014
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feat(fingerprint): password OR fingerprint in parallel at one prompt
Bernardo promoted the PROPOSED item live: with fingerprint PAM on,
sudo/login should accept whichever factor comes first instead of
pam_fprintd's wait-for-the-reader-then-password. Stock PAM cannot
express parallel factors (linux-pam#301), so this packages
pam-fprint-grosshack v0.3.0 (pkgs/, pinned from GitLab — the
field-standard fprintd fork), source-reviewed before packaging: every
failure path (no reader, no prints, fprintd absent/hung, timeout,
password typed) returns PAM_AUTHINFO_UNAVAIL and falls through; a
typed password is only ferried via PAM_AUTHTOK to the stock
`auth sufficient pam_unix.so … try_first_pass` rule — the module never
validates passwords itself, so it cannot lock out password login.

New option nomarchy.hardware.fingerprint.parallel, default TRUE (the
better UX is what opting into fingerprint PAM buys; false = stock
sequential). Wiring swaps the modulePath of stock fprintd's rule slot
(mkForce) so the sufficient-before-pam_unix ordering is inherited, not
recomputed. README + downstream template rows added.

Verified: V2 — checks.hardware-toggles extended to three nodes, green:
parallel node asserts the grosshack auth line precedes pam_unix in
/etc/pam.d/sudo and that with NO reader a correct password still
passes sudo while a wrong one fails (the lockout-safety invariant);
seqpam node gets stock pam_fprintd and no grosshack; nopam gets
neither. flake check + option-docs + template-sot green.
V3 pending (HARDWARE-QUEUE, AMD dev box): the real type-or-touch race,
fprintd-stopped fallback, hyprlock/greeter after a fingerprint win.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-12 19:03:56 +01:00

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# Your machine: bootloader, hostname, users, services.
# The distro itself comes from nomarchy.nixosModules.nomarchy — override
# any of its defaults here with plain NixOS options (they use mkDefault),
# or via the nomarchy.system.* toggles.
#
# Source of truth for install and flake-init: nomarchy-install copies this
# file and only patches placeholders + the __NOMARCHY_INSTALLER__ region.
{ pkgs, username, ... }:
{
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
networking.hostName = "my-nomarchy";
time.timeZone = "UTC";
i18n.defaultLocale = "en_US.UTF-8";
# One keyboard layout everywhere: xkb is the source of truth; the distro
# defaults (console.useXkbConfig + systemd initrd) derive the virtual
# console and the LUKS passphrase prompt from it. Match home.nix
# nomarchy.keyboard.*.
services.xserver.xkb.layout = "us";
services.xserver.xkb.variant = "";
# Your login user — `username` flows in from flake.nix automatically.
# The installer adds initialHashedPassword here; flake-init: set a password
# (or users.mutableUsers) before first boot if needed.
users.users.${username} = {
isNormalUser = true;
extraGroups = [ "wheel" "networkmanager" "video" "input" ];
};
# __NOMARCHY_INSTALLER_BEGIN__
# Installer fills this region (power, hardware, snapper, resume, autoLogin).
# Flake-init: leave empty and use the commented catalog below, or enable
# snapper when on BTRFS with a /.snapshots subvolume:
# nomarchy.system.snapper.enable = true;
# __NOMARCHY_INSTALLER_END__
# ── Overrides (uncomment to change) ─────────────────────────────────
# nomarchy.system.greeter.enable = false; # bring your own login manager
# environment.systemPackages = [ pkgs.htop ];
# ── Opt-in features — uncomment and tweak to enable ─────────────────
# nomarchy.system.power = { # active power management (laptops)
# enable = true;
# backend = "ppd"; # "ppd" (default) or "tlp"
# laptop = true; # required by batteryChargeLimit
# batteryChargeLimit = 80; # cap charging for longevity
# thermal.enable = true; # thermald (Intel CPUs)
# };
#
# nomarchy.system.autoTimezone.enable = true; # clock follows your location
# # (geoclue); travelling updates the
# # time on its own. Unsets time.timeZone
# # above. Easier toggled from System menu.
#
# nomarchy.hardware = { # enablement above nixos-hardware (installer-detected)
# intel.enable = true; # GuC/HuC firmware; installer sets this on Intel
# intel.computeRuntime = true; # OpenCL/oneVPL GPU compute (opt-in)
# amd.enable = true; # amd-pstate + radeonsi VA-API; installer-set on AMD
# amd.rocm.enable = true; # ROCm GPU compute (multi-GB, opt-in)
# amd.rocm.gfxOverride = "11.0.0"; # HSA override for an unlisted iGPU
# fingerprint.enable = true; # fprintd; installer-set when a reader is detected
# fingerprint.pam = true; # use the fingerprint for login + sudo
# fingerprint.parallel = false; # sequential prompt instead of password-or-finger
# npu.enable = true; # on-die NPU driver (experimental; userspace runtime BYO)
# latestKernel = true; # newest kernel for very-new hardware (drivers not yet in the default)
# camera.hideIrSensor = true; # dual-sensor webcam: hide the IR node so apps get the color cam
# # (installer-set when a paired RGB+IR webcam is detected)
# i2c.enable = true; # /dev/i2c-* (RGB, sensors); ddcci is distro-default for external brightness
# i2c.ddcci = true; # already mkDefault true — set false to opt out
# };
#
# nomarchy.services.tailscale.enable = true; # mesh VPN — connect from System VPN
# # (login user is operator, no sudo)
# nomarchy.services.syncthing.enable = true; # file sync — GUI at http://127.0.0.1:8384
# nomarchy.services.podman.enable = true; # rootless containers (docker → podman)
# nomarchy.services.flatpak.enable = true; # Flatpak + the Flathub remote
# nomarchy.services.pika.enable = true; # Pika Backup (GUI Borg backups)
# nomarchy.services.steam.enable = true; # Steam (32-bit libs, controllers, ports)
# nomarchy.services.libvirt.enable = true; # libvirt/KVM + virt-manager GUI
# nomarchy.services.obs.enable = true; # OBS Studio + v4l2loopback virtual camera
# nomarchy.services.docker.enable = true; # Docker rootful (not alongside podman)
# nomarchy.services.kdeconnect.enable = true;# KDE Connect phone integration (opens ports)
# nomarchy.services.gamemode.enable = true; # Feral GameMode performance daemon
# nomarchy.services.adb.enable = true; # Android adb/fastboot tools
# nomarchy.services.wireshark.enable = true; # Wireshark GUI (wireshark group, no root)
# nomarchy.services.ollama.enable = true; # local LLM runtime (127.0.0.1:11434)
# nomarchy.services.printing.enable = true; # CUPS + Avahi network printer discovery
# nomarchy.services.openrgb.enable = true; # RGB peripheral/motherboard lighting daemon
# nomarchy.services.restic = { # scheduled (daily) restic backup
# enable = true;
# repository = "/mnt/backup/restic"; # path or URL (sftp:/b2:/…)
# passwordFile = "/etc/nomarchy/restic-password"; # absolute path, NOT in the flake
# paths = [ "/home" ];
# };
system.stateVersion = "26.05";
}