diff --git a/machines/john-endesktop/configuration.nix b/machines/john-endesktop/configuration.nix
index ec20935..b0a075c 100644
--- a/machines/john-endesktop/configuration.nix
+++ b/machines/john-endesktop/configuration.nix
@@ -110,6 +110,15 @@ with lib;
     role = "agent";
     # serverAddr defaults to https://10.0.0.222:6443
     # tokenFile defaults to /etc/k3s/token
+    extraFlags = [
+      # Node labels for workload scheduling
+      # fast-cpu: This node has a faster CPU than other cluster nodes
+      "--node-label=fast-cpu=true"
+      # fast-storage: This node is the NFS host with fast local storage access
+      "--node-label=fast-storage=true"
+      # k3s-upgrade=disabled: NixOS manages k3s upgrades via Nix, not system-upgrade-controller
+      "--node-label=k3s-upgrade=disabled"
+    ];
   };
 
   # Time zone