add options to allow backing up to specific machine

backup-target.nix

@@ -0,0 +1,15 @@
+# configuration allowing this machine to be user as a backup server
+{ config, lib, pkgs, ... }:
+
+{
+  users.users.backup = {
+    isNormalUser = true;
+    openssh.authorizedKeys.keys = [
+    ''command="${pkgs.rrsync}/bin/rrsync /mnt/backup/",restrict sh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIF1e7hxxQD7pVKMquEuiBrLNFfx9ZRAOU1SGky4iXacD Ithuriel@openmediavault''
+    ];
+
+    packages = [
+      pkgs.rsync
+    ];
+  };
+}

configuration.nix

@@ -5,11 +5,6 @@
 { config, lib, pkgs, ... }:
 
 {
-  imports =
-    [ # Include the results of the hardware scan.
-      ./hardware-configuration.nix
-    ];
-
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
 
   nixpkgs.config.allowUnfree = true;

flake.nix

@@ -20,6 +20,8 @@
         system = "x86_64-linux";
 	specialArgs = inputs;
 	modules = [
+      ./hardware/desk.nix
+
 	  ./configuration.nix 
 	  ./nvidia.nix
 	  ./plasma.nix

hardware/desk.nix

@@ -0,0 +1,56 @@
+# 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.
+##test
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "NIX_DESK_POOL/root";
+      fsType = "zfs";
+    };
+
+  fileSystems."/nix" =
+    { device = "NIX_DESK_POOL/nix";
+      fsType = "zfs";
+    };
+
+  fileSystems."/var" =
+    { device = "NIX_DESK_POOL/var";
+      fsType = "zfs";
+    };
+
+  fileSystems."/home" =
+    { device = "NIX_DESK_POOL/home";
+      fsType = "zfs";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/E943-DA32";
+      fsType = "vfat";
+      options = [ "fmask=0022" "dmask=0022" ];
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/7e1ada61-7a9b-4d28-b608-23d1ac7f4e29"; }
+    ];
+
+  # 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.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}