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systems/x86_64/vm/flake.nix

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+{
+  description = "nixos-vm";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
+  };
+
+  outputs = { self, nixpkgs, ... }@inputs: {
+    nixosConfigurations = {
+      "nixos-vm" = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          # Import the configuration.nix we used before, so that the old configuration file can still take effect. 
+          # Note: /etc/nixos/configuration.nix itself is also a Nix Module, so you can import it directly here
+#          ./configuration.nix
+          ./hardware-configuration.nix
+
+          ({config, pkgs, ...}: {
+            nix = {
+              settings.auto-optimise-store = true;
+              settings.experimental-features = [ "nix-command" "flakes" ];
+           
+              gc = {
+                automatic = true;
+                dates = "weekly";
+                options = "--delete-older-than 30d";
+              };
+            };
+
+            nixpkgs.config.allowUnfree = true; 
+
+            boot = {
+              # kernelPackages = pkgs.linuxPackages_latest;
+              kernelParams = [ "console=ttyS0,1920n8" ];
+
+              binfmt.emulatedSystems = [ "aarch64-linux" ];
+
+              loader.systemd-boot.enable = true;
+              loader.systemd-boot.consoleMode = "0";
+            };
+             
+            networking = {
+              hostName = "nixos-vm";
+              networkmanager.enable = true;
+            };
+
+            users.users.aaronh = {
+              isNormalUser = true;
+              extraGroups = [ "wheel" "networkmanager" ]; # Enable ‘sudo’ for the user.
+              packages = with pkgs; [
+                cargo
+                git
+                git-lfs
+                mdbook
+                neofetch
+                restic
+                roboto-slab
+
+                firefox
+              ];
+            };
+
+            environment.systemPackages = with pkgs; [
+              avahi
+              dmidecode
+              libcamera
+              lshw
+              nix-index
+              sysstat
+              tree
+              unzip
+              wget
+            ];
+
+            # GNOME
+            services.xserver = {
+              enable = true;
+              displayManager.gdm.enable = true;
+              desktopManager.gnome.enable = true;
+            };
+
+            # Add GNOME packages
+            environment.systemPackages = (with pkgs; [
+              gnome.dconf-editor
+              gnome.gnome-tweaks
+              gnomeExtensions.appindicator
+              gnomeExtensions.pop-shell
+              gnomeExtensions.pop-launcher-super-key
+            ]);
+
+            # Remove GNOME packages
+            environment.gnome.excludePackages = (with pkgs; [
+              epiphany # web browser
+              gnome.geary
+              gnome.gnome-software
+              gnome-connections
+              gnome-photos
+              gnome-tour
+            ]);
+
+            # Services
+            services.udev.packages = with pkgs; [ gnome.gnome-settings-daemon ];
+
+            hardware.pulseaudio.enable = false;
+             
+            security.rtkit.enable = true;
+            services.pipewire = {
+              enable = true;
+              alsa.enable = true;
+              alsa.support32Bit = true;
+              pulse.enable = true;
+            };
+
+            services = {
+              fwupd.enable = true;
+              printing.enable = true;
+              openssh.enable = true;
+            };
+ 
+            services.avahi = {
+              enable = true;
+              nssmdns = true;
+              openFirewall = true;
+            };
+  
+            system = {
+              stateVersion = "23.05";
+              autoUpgrade.enable = true;
+            };
+          })
+        ];
+      };
+    };
+  };
+}