Initial commit

.gitignore

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+result
+nixos.qcow2

README.md

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+# Building NixOS VM
+`nix build .#nixosConfigurations.nixosvm.config.system.build.vm`
+https://gist.github.com/FlakM/0535b8aa7efec56906c5ab5e32580adf

configuration.nix

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+# Edit this configuration file to define what should be installed on
+# your system. Help is available in the configuration.nix(5) man page, on
+# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
+
+{ config, lib, pkgs, ... }:
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/26d499fc9f1d567283d5d56fcf367edd815dba1d.tar.gz";
+in
+
+{
+  imports =
+    [ # Include the results of the hardware scan.
+      # ./hardware-configuration.nix
+      ./hyprland.nix
+    ];
+
+  # Use the systemd-boot EFI boot loader.
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # Virtual machine options
+  # virtualisation.vmVariant = {
+  #   virtualisation = {
+  #     memorySize = 8192;
+  #     cores = 8;
+  #   };
+  # };
+
+  networking.hostName = "nixos"; # Define your hostname.
+  # Pick only one of the below networking options.
+  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+  # networking.networkmanager.enable = true;  # Easiest to use and most distros use this by default.
+
+  # Set your time zone.
+  time.timeZone = "America/New_York";
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # Select internationalisation properties.
+  i18n.defaultLocale = "en_US.UTF-8";
+  # console = {
+  #   font = "Lat2-Terminus16";
+  #   keyMap = "us";
+  #   useXkbConfig = true; # use xkb.options in tty.
+  # };
+
+  # Enable the X11 windowing system.
+  #services.xserver.enable = true;
+
+  # Enable the GNOME Desktop Environment
+  #services.xserver.displayManager.gdm.enable = true;
+  #services.xserver.desktopManager.gnome.enable = true;
+  
+  # Drivers
+  services.xserver.videoDrivers = [
+    "nvidia"
+  ];
+
+  # Configure keymap in X11
+  # services.xserver.xkb.layout = "us";
+  # services.xserver.xkb.options = "eurosign:e,caps:escape";
+
+  # Enable CUPS to print documents.
+  # services.printing.enable = true;
+
+  # Enable sound.
+  # hardware.pulseaudio.enable = true;
+  # OR
+  # services.pipewire = {
+  #   enable = true;
+  #   pulse.enable = true;
+  # };
+
+  # Enable touchpad support (enabled default in most desktopManager).
+  # services.libinput.enable = true;
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.josh = {
+    isNormalUser = true;
+    initialPassword = "test";
+    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+    packages = with pkgs; [
+      cowsay
+      lolcat
+      htop
+      firefox
+      pciutils
+      vim
+    ];
+  };
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  # environment.systemPackages = with pkgs; [
+  #   vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
+  #   wget
+  # ];
+
+  # Some programs need SUID wrappers, can be configured further or are
+  # started in user sessions.
+  # programs.mtr.enable = true;
+  # programs.gnupg.agent = {
+  #   enable = true;
+  #   enableSSHSupport = true;
+  # };
+
+  # List services that you want to enable:
+
+  # Enable the OpenSSH daemon.
+  # services.openssh.enable = true;
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
+  # Copy the NixOS configuration file and link it from the resulting system
+  # (/run/current-system/configuration.nix). This is useful in case you
+  # accidentally delete configuration.nix.
+  # system.copySystemConfiguration = true;
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  #
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  #
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  #
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  #
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  #
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "24.05"; # Did you read the comment?
+
+}
+

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1753345091,
+        "narHash": "sha256-CdX2Rtvp5I8HGu9swBmYuq+ILwRxpXdJwlpg8jvN4tU=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3ff0e34b1383648053bba8ed03f201d3466f90c9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+  };
+
+  outputs = { self, nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+    in
+    {
+      nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
+        modules = [
+          { nix.settings.experimental-features = ["nix-command" "flakes"]; }
+          ./configuration.nix
+        ];
+      };
+
+      nixosConfigurations.nixosvm = nixpkgs.lib.nixosSystem {
+        inherit system;
+        modules = [
+          {
+            nix.settings.experimental-features = ["nix-command" "flakes"];
+            virtualisation.vmVariant = {
+              virtualisation = {
+                memorySize = 8192;
+                cores = 8;
+              };
+            };
+          }
+          ./configuration.nix
+        ];
+      };
+    };
+}

hardware-configuration.nix

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+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "nvme" "usbhid" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/1b805e8b-8c98-4822-ab83-4985313edde2";
+      fsType = "btrfs";
+      options = [ "subvol=@" ];
+    };
+
+  fileSystems."/.snapshots" =
+    { device = "/dev/disk/by-uuid/1b805e8b-8c98-4822-ab83-4985313edde2";
+      fsType = "btrfs";
+      options = [ "subvol=@.snapshots" ];
+    };
+
+  fileSystems."/home" =
+    { device = "/dev/disk/by-uuid/1b805e8b-8c98-4822-ab83-4985313edde2";
+      fsType = "btrfs";
+      options = [ "subvol=@home" ];
+    };
+
+  fileSystems."/var/cache/pacman/pkg" =
+    { device = "/dev/disk/by-uuid/1b805e8b-8c98-4822-ab83-4985313edde2";
+      fsType = "btrfs";
+      options = [ "subvol=@pkg" ];
+    };
+
+  fileSystems."/var/log" =
+    { device = "/dev/disk/by-uuid/1b805e8b-8c98-4822-ab83-4985313edde2";
+      fsType = "btrfs";
+      options = [ "subvol=@log" ];
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/14F8-5905";
+      fsType = "vfat";
+      options = [ "fmask=0022" "dmask=0022" ];
+    };
+
+  fileSystems."/misc" =
+    { device = "/etc/autofs/auto.misc";
+      fsType = "autofs";
+    };
+
+  fileSystems."/net" =
+    { device = "-hosts";
+      fsType = "autofs";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-31542a7e57f0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-69965655bcab.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-7032ce7b26c2.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-733a8e75a123.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-88821a6825f9.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-9876c096cccf.useDHCP = lib.mkDefault true;
+  # networking.interfaces.br-ce1af49d610b.useDHCP = lib.mkDefault true;
+  # networking.interfaces.docker0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp14s0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.virbr0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

hyprland.nix

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+{ config, lib, pkgs, ... }:
+
+{
+  programs.hyprland = {
+    enable = true;
+    withUWSM = true;
+    xwayland.enable = true;
+  };
+
+  services.xserver.displayManager.gdm = {
+    enable = true;
+    wayland = true;
+  };
+
+  xdg.portal = {
+    enable = true;
+    extraPortals = [
+      pkgs.xdg-desktop-portal-gtk
+    ];
+  };
+
+  hardware = {
+    graphics.enable = true;
+  };
+
+  environment = {
+    systemPackages = [
+      pkgs.kitty
+
+      pkgs.waybar
+
+      pkgs.dunst
+      pkgs.libnotify
+
+      pkgs.swww
+
+      pkgs.rofi-wayland
+
+      pkgs.networkmanager
+      pkgs.networkmanagerapplet
+    ];
+
+    sessionVariables = {
+      NIXOS_OZONE_WL = "1";
+    };
+  };
+}

rebuild.sh

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+echo "Removing old qcow2 disk ..."
+rm -f ./nixos.qcow2
+echo "Building new VM ..."
+nix build .#nixosConfigurations.nixosvm.config.system.build.vm
+echo "Done!"