{ modulesPath, pkgs, ... }: { imports = [ (modulesPath + "/installer/scan/not-detected.nix") ]; boot = { initrd = { availableKernelModules = [ "xhci_pci" "ahci" "nvme" "uas" "sd_mod" ]; kernelModules = [ ]; systemd = { enable = true; initrdBin = [ pkgs.libuuid pkgs.gawk ]; services.rollback = { description = "Rollback btrfs root subvolume"; wantedBy = [ "initrd.target" ]; before = [ "sysroot.mount" ]; after = [ "initrd-root-device.target" ]; unitConfig.DefaultDependencies = "no"; serviceConfig.Type = "oneshot"; script = '' mkdir -p /mnt DISK_LABEL="NixOS-Primary" ATTEMPTS=5 printf "Attempting to find disk with label '%s'\n" "$DISK_LABEL" while ((ATTEMPTS > 0)); do if findfs LABEL="$DISK_LABEL"; then printf "Found disk!\n" break; fi ((ATTEMPTS--)) sleep 3 printf "Remaining disk discovery attempts: %s\n" "$ATTEMPTS" done mount -t btrfs -o subvol=/ $(findfs LABEL="$DISK_LABEL") /mnt btrfs subvolume list -to /mnt/root \ | awk 'NR>2 { printf $4"\n" }' \ | while read subvol; do printf "Removing Subvolume: %s\n" "$subvol"; btrfs subvolume delete "/mnt/$subvol" done printf "Removing /root subvolume\n" btrfs subvolume delete /mnt/root printf "Restoring base /root subvolume\n" btrfs subvolume snapshot /mnt/root-base /mnt/root umount /mnt ''; }; }; }; loader = { systemd-boot.enable = true; efi.canTouchEfiVariables = true; }; kernelModules = [ "kvm-intel" ]; extraModulePackages = [ ]; }; }