system/usb: add config for usb stick

outputs/system.nix

@@ -10,4 +10,11 @@ with inputs;
       ../system/machine/home
     ];
   };
+  usbStick = nixpkgs.lib.nixosSystem {
+    inherit system;
+    modules = [
+      ../system/configuration.nix
+      ../system/machine/usb-stick
+    ];
+  };
 }

system/machine/usb-stick/default.nix

@@ -0,0 +1,59 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [
+    # Include the results of the hardware scan.
+    ./hardware-configuration.nix
+  ];
+
+  boot = {
+    # Use the GRUB 2 boot loader.
+    loader.grub = {
+      enable = true;
+      device = "/dev/disk/by-uuid/8e7c22c5-5c88-47a1-becf-6dbf05f4067d";
+    };
+
+    kernelPackages = pkgs.linuxPackages_latest;
+    extraModulePackages = with config.boot.kernelPackages; [
+      rtl88x2bu
+    ];
+  };
+
+  networking = {
+    hostName = "usb-stick"; # Define your hostname.
+
+    interfaces = {
+      enp3s0.useDHCP = true;
+      wlp11s0f3u2.useDHCP = true;
+    };
+  };
+
+  environment.systemPackages = with pkgs; [ parted ];
+
+  services.xserver = {
+    # All monitors in the right order
+    # Source: https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/x11/xserver.nix#L83
+    xrandrHeads = [
+      {
+        output = "HDMI-A-0";
+        monitorConfig = ''
+          Option "PreferredMode" "1920x1080"
+          Option "Rotate" "right"
+        '';
+      }
+      {
+        output = "DisplayPort-1";
+        primary = true;
+        monitorConfig = ''
+          Option "PreferredMode" "2560x1440"
+        '';
+      }
+    ];
+  };
+
+  sound.enable = lib.mkForce false;
+
+  programs.gnupg.agent.enable = lib.mkForce false;
+  virtualisation.docker.enable = lib.mkForce false;
+  nix.gc.automatic = lib.mkForce false;
+}

system/machine/usb-stick/hardware-configuration.nix

@@ -0,0 +1,47 @@
+# 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 = [ "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-uuid/2e6b4520-dd52-4593-afb4-bd585bd1215c";
+      fsType = "ext4";
+    };
+
+    "/home" = {
+      device = "/dev/disk/by-uuid/e17fb0c0-9482-436d-83e8-3760772fe9b8";
+      fsType = "ext4";
+    };
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-uuid/ca4a3ef2-1428-4021-9b67-464fb2e2b7a7"; }
+  ];
+
+  # 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-dd3908647dce.useDHCP = lib.mkDefault true;
+  # networking.interfaces.docker0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp3s0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.vethca7bcf0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.vethcaab0c1.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlp11s0f3u2.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}