Update

modules/base.nix

@@ -4,7 +4,7 @@
   boot = {
     loader.systemd-boot.enable = true;
     loader.efi.canTouchEfiVariables = true;
-    kernelPackages = pkgs.linuxPackages_latest;
+    kernelPackages = pkgs.linuxPackages_cachyos;
     supportedFilesystems = [ "ntfs" ];
 
     # Helpful for large games, shader caches and some launchers.
@@ -16,10 +16,11 @@
 
   networking.networkmanager.enable = true;
 
-  time.timeZone = "Europe/Berlin";
+  # Override these in configuration.nix if you need local defaults.
+  time.timeZone = lib.mkDefault "UTC";
 
-  i18n.defaultLocale = "de_DE.UTF-8";
-  console.keyMap = "de";
+  i18n.defaultLocale = lib.mkDefault "en_US.UTF-8";
+  console.keyMap = lib.mkDefault "us";
 
   nix.settings = {
     experimental-features = [ "nix-command" "flakes" ];
@@ -40,6 +41,7 @@
   hardware = {
     enableRedistributableFirmware = true;
     cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+    cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
   };
 
   services.fwupd.enable = true;