NixOS config for dual boot with Omarchy

configuration.nix

{ config, pkgs, ... }:

{
  imports = [
    ./hardware-configuration.nix
  ];

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.loader.efi.efiSysMountPoint = "/boot";
  boot.loader.timeout = 0;

  boot.initrd.luks.devices."cryptroot" = {
    device = "/dev/disk/by-uuid/ac4acc0b-1417-44cf-8145-00daff20adfb";
    preLVM = true;
    allowDiscards = true;
  };

  networking.hostName = "nixos";
  networking.networkmanager.enable = true;

  time.timeZone = "Australia/Sydney";
  i18n.defaultLocale = "en_AU.UTF-8";

  users.users.graeme = {
    isNormalUser = true;
    description = "Graeme";
    extraGroups = [ "wheel" "networkmanager" ];
    initialPassword = "changeme";
  };

  nixpkgs.config.allowUnfree = true;

  environment.systemPackages = with pkgs; [
    vim git wget curl htop
  ];

  services.openssh.enable = true;
  networking.firewall.enable = true;
  networking.firewall.allowedTCPPorts = [ 22 ];

  system.stateVersion = "24.11";
}

hardware-configuration.nix

{ config, lib, pkgs, modulesPath, ... }:

{
  imports = [
    (modulesPath + "/installer/scan/not-detected.nix")
  ];

  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usbhid" "sd_mod" ];
  boot.initrd.kernelModules = [ ];
  boot.kernelModules = [ "kvm-amd" ];
  boot.extraModulePackages = [ ];

  fileSystems."/" = {
    device = "/dev/disk/by-uuid/8658615e-9026-4926-ae9a-eef75ca61124";
    fsType = "btrfs";
    options = [ "subvol=@nixos" "compress=zstd" "noatime" ];
  };

  fileSystems."/nix" = {
    device = "/dev/disk/by-uuid/8658615e-9026-4926-ae9a-eef75ca61124";
    fsType = "btrfs";
    options = [ "subvol=@nixos-nix" "compress=zstd" "noatime" ];
  };

  fileSystems."/home" = {
    device = "/dev/disk/by-uuid/8658615e-9026-4926-ae9a-eef75ca61124";
    fsType = "btrfs";
    options = [ "subvol=@nixos-home" "compress=zstd" "noatime" ];
  };

  fileSystems."/boot" = {
    device = "/dev/disk/by-uuid/29B0-FFC9";
    fsType = "vfat";
    options = [ "fmask=0077" "dmask=0077" ];
  };

  zramSwap.enable = true;
  zramSwap.memoryPercent = 25;

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
}