{ boot = { initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" ]; kernelModules = [ "kvm-amd" "i2c-dev" ]; }; services.smartd.enable = true; hardware.cpu.amd.updateMicrocode = true; }