Simple btrbk config

machines/morpheus.nix

@@ -15,6 +15,7 @@ inputs.nixpkgs.lib.nixosSystem {
       nixpkgs.overlays = [ overlay-unstable ];
     })
     (import ./common.nix inputs)
+    (import ./morpheus/btrbk.nix inputs)
     (import ./dev.nix inputs)
     (import ./entertainment.nix inputs)
     (import ./office.nix inputs)

machines/morpheus/btrbk.nix

@@ -0,0 +1,25 @@
+{ ... }: {
+  services.btrbk = {
+    instances = {
+      home = {
+        settings = {
+          snapshot_preserve = "24h 14d 4w 12m";
+          snapshot_preserve_min = "latest";
+
+          /* don't auto cleanup target */
+          target_preserve_min = "all";
+
+          volume."/" = {
+            snapshot_dir = ".btrbk";
+            subvolume = {
+              home = {
+                snapshot_create = "always";
+              };
+            };
+            target = "/run/media/me/backup/morpheus";
+          };
+        };
+      };
+    };
+  };
+}