nixos/hosts/sigma/hardware.nix

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{
config,
lib,
pkgs,
modulesPath,
nixos-hardware,
...
}: {
imports = [
(modulesPath + "/installer/scan/not-detected.nix")
nixos-hardware.nixosModules.common-cpu-amd
nixos-hardware.nixosModules.common-cpu-amd-pstate
nixos-hardware.nixosModules.common-pc
nixos-hardware.nixosModules.common-pc-ssd
];
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boot.initrd.availableKernelModules = ["nvme" "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod"];
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boot.initrd.kernelModules = ["dm-snapshot"];
boot.kernelModules = ["kvm-amd"];
boot.extraModulePackages = [];
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boot.supportedFilesystems = {};
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# https://elis.nu/blog/2020/05/nixos-tmpfs-as-root/
fileSystems."/" = {
device = "none";
fsType = "tmpfs";
options = ["defaults" "size=4G" "mode=755"]; # mode=755 so only root can write to those files
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};
fileSystems."/boot" = {
device = "/dev/disk/by-label/BOOT";
fsType = "vfat";
};
fileSystems."/nix" = {
device = "/dev/disk/by-label/nix";
neededForBoot = true;
fsType = "ext4";
};
swapDevices = [
{
device = "/nix/persist/swapfile";
size = 16 * 1024; # 16 GiB
}
];
# Enables DHCP on all ethernet and wireless LAN interfaces.
networking.useDHCP = lib.mkDefault true;
nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
}