Add initial legacy configuration

nixos-configurations/ochsenchopf/filesystems.nix

@@ -0,0 +1,43 @@
+{
+  lib,
+  ...
+}:
+{
+
+  boot.initrd.luks.devices = {
+    "luks".device = "/dev/disk/by-label/luks";
+  };
+
+  fileSystems =
+    let
+      rootdev = "/dev/disk/by-label/hv_ochsenchopf";
+    in
+    {
+      "/" = {
+        device = rootdev;
+        fsType = "btrfs";
+        options = [ "subvol=nixos" ];
+      };
+      "/home" = {
+        device = rootdev;
+        fsType = "btrfs";
+        options = [ "subvol=home" ];
+      };
+      "/boot" = {
+        device = "/dev/disk/by-label/boot";
+        fsType = "vfat";
+      };
+    };
+
+  swapDevices = [ { device = "/dev/disk/by-label/swap"; } ];
+
+  # Use the systemd-boot EFI boot loader.
+  boot.loader.systemd-boot.enable = lib.mkForce false;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  boot.initrd.systemd.enable = true;
+  boot.lanzaboote = {
+    enable = true;
+    pkiBundle = "/etc/secureboot";
+  };
+}