diff --git a/bin/operator/src/succinct/mod.rs b/bin/operator/src/succinct/mod.rs
index d5d615e..a214f87 100644
--- a/bin/operator/src/succinct/mod.rs
+++ b/bin/operator/src/succinct/mod.rs
@@ -283,17 +283,21 @@ impl Client {
             self.config.contract_address.0 != [0u8; 20],
             "no contract address"
         );
+        let function_id = circuit.function_id(&self.contract).await?;
+        debug!("requesting relayed proof for {:?}", function_id);
+        ensure!(
+            self.releases
+                .iter()
+                .any(|d| d.function_id == hex::encode(function_id)),
+            "function_id not found in active releases"
+        );
         let request_id = self
             .ext
             .submit_request(
                 circuit.deployment(&self.releases).chain_id,
                 self.config.contract_address.0 .0.into(),
                 circuit.with_selector(&req.input).into(),
-                circuit
-                    .function_id(&self.contract)
-                    .await
-                    .inspect(|d| debug!("function_id: {:?}", d))?
-                    .into(),
+                function_id.into(),
                 req.input.into(),
             )
             .await
diff --git a/flake.nix b/flake.nix
index 0091b4f..47ab6c9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,7 +45,11 @@
             vscode-extensions.vadimcn.vscode-lldb.adapter
             rust-analyzer
 
-            (google-cloud-sdk.withExtraComponents ([pkgs.google-cloud-sdk.components.cloud-run-proxy]))
+            (google-cloud-sdk.withExtraComponents ([
+              pkgs.google-cloud-sdk.components.cloud-run-proxy 
+              pkgs.google-cloud-sdk.components.gke-gcloud-auth-plugin
+            ]))
+            kubectl
 
           ];
           buildInputs = with pkgs; [