nix: switching to using flakes

nix/hardware-configuration.nix

@@ -0,0 +1,42 @@
+# 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 = [ "ehci_pci" "ahci" "xhci_pci" "usbhid" "usb_storage" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/7469546c-44d6-44a7-aecd-28aae51c84ca";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot/efi" =
+    { device = "/dev/disk/by-uuid/5A58-A8EB";
+      fsType = "vfat";
+    };
+
+  fileSystems."/home" =
+    { device = "/dev/disk/by-uuid/232d00ae-a844-4b59-97e9-d7248ff179a4";
+      fsType = "btrfs";
+    };
+
+  swapDevices = [ { device = "/swapfile"; } ];
+
+  # 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.enp4s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}