Actually make sparky a NFS replica.

flake.nix

@@ -159,12 +159,9 @@
         c2 = mkHost "x86_64-linux" "minimal" [ ./hosts/c2 ];
         c3 = mkHost "x86_64-linux" "minimal" [ ./hosts/c3 ];
         alo-cloud-1 = mkHost "aarch64-linux" "cloud" [ ./hosts/alo-cloud-1 ];
-        zippy = mkHost "x86_64-linux" "minimal" [
-          ethereum-nix.nixosModules.default
-          ./hosts/zippy
-        ];
+        zippy = mkHost "x86_64-linux" "minimal" [ ./hosts/zippy ];
         chilly = mkHost "x86_64-linux" "workstation" [ ./hosts/chilly ];
-        sparky = mkHost "x86_64-linux" "desktop" [ ./hosts/sparky ];
+        sparky = mkHost "x86_64-linux" "minimal" [ ./hosts/sparky ];
         beefy = mkHost "x86_64-linux" "desktop" [ ./hosts/beefy ];
         stinky = mkHost "aarch64-linux" "minimal" [
           nixos-hardware.nixosModules.raspberry-pi-4

hosts/sparky/default.nix

@@ -4,7 +4,6 @@
     ../../common/encrypted-btrfs-layout.nix
     ../../common/global
     ../../common/cluster-member.nix
-    ../../common/cluster-tools.nix
     ../../common/nomad-worker.nix
     ../../common/nfs-services-standby.nix
     ./hardware.nix
@@ -18,4 +17,8 @@
 
   networking.hostName = "sparky";
   services.tailscaleAutoconnect.authkey = "tskey-auth-kBCKN7QNv411CNTRL-n5Td7Jw7h3TAjubEeLmy1THy33JvD9JnM";
+
+  nfsServicesStandby.replicationKeys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHyTKsMCbwCIlMcC/aopgz5Yfx/Q9QdlWC9jzMLgYFAV root@zippy-replication"
+  ];
 }