I tried going all in on dendritic, but I think I'm gonna go for a lighter approach

modules/nix/impermanence.nix

@@ -0,0 +1,54 @@
+{ inputs, ... }:
+
+{
+  flake-file.inputs = {
+    impermanence.url = "github:nix-community/impermanence";
+  };
+
+  # convenience function to set persistence settings only, if impermanence module was imported
+  flake.lib = {
+    mkIfPersistence =
+      config: settings:
+      if config ? home then
+        (if config.home ? persistence then settings else { })
+      else
+        (if config.environment ? persistence then settings else { });
+  };
+
+  flake.modules.nixos.impermanence =
+    { config, ... }:
+    {
+      imports = [
+        inputs.impermanence.nixosModules.impermanence
+      ];
+
+      environment.persistence."/persistent" = {
+        hideMounts = true;
+        directories = [
+          "/var/log"
+          "/var/lib/nixos"
+          "/var/lib/systemd/coredump"
+          "/etc/NetworkManager/system-connections"
+        ];
+        files = [
+          "/etc/machine-id"
+          "/etc/ssh/ssh_host_ed25519_key"
+          "/etc/ssh/ssh_host_ed25519_key.pub"
+          "/etc/ssh/ssh_host_rsa_key"
+          "/etc/ssh/ssh_host_rsa_key.pub"
+        ];
+      };
+
+      # home-manager.sharedModules = [
+      #   {
+      #     home.persistence."/persistent" = {
+      #     };
+      #   }
+      # ];
+
+      fileSystems."/persistent".neededForBoot = true;
+
+      programs.fuse.userAllowOther = true;
+    };
+
+}