added mc7

systems/mc7/configuration.nix

@@ -0,0 +1,11 @@
+{ config, pkgs, ... }:
+{
+  imports =
+    [
+      ./hardware-configuration.nix
+      ./modules/generic.nix
+      ./modules/borg.nix
+    ];
+
+  system.stateVersion = "22.05";
+}

systems/mc7/hardware-configuration.nix

@@ -0,0 +1,39 @@
+# 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 = [ ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "vmw_pvscsi" "floppy" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+  boot.loader.grub.device = "/dev/sda";
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/126b990a-4493-4dfd-a2f8-5392454e1760";
+      fsType = "btrfs";
+      options = [ "compress-force=zstd" ];
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/46a8cf4d-679a-44bc-a3b1-886331c133d8";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
+  # Per-interface useDHCP will be mandatory in the future, so this generated config
+  # replicates the default behaviour.
+  networking.useDHCP = lib.mkDefault false;
+  networking.interfaces.ens192.useDHCP = lib.mkDefault true;
+  networking.hostName = "mc7";
+
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}