diff --git a/src/eth/executor/executor.rs b/src/eth/executor/executor.rs
index 8ba514f92..2a85240a2 100644
--- a/src/eth/executor/executor.rs
+++ b/src/eth/executor/executor.rs
@@ -7,6 +7,7 @@ use anyhow::anyhow;
 use tracing::info_span;
 use tracing::Span;
 
+#[cfg(feature = "metrics")]
 use crate::eth::codegen;
 use crate::eth::executor::Evm;
 use crate::eth::executor::EvmExecutionResult;
diff --git a/src/eth/rpc/rpc_context.rs b/src/eth/rpc/rpc_context.rs
index 673bbccc6..1e1376991 100644
--- a/src/eth/rpc/rpc_context.rs
+++ b/src/eth/rpc/rpc_context.rs
@@ -23,7 +23,6 @@ pub struct RpcContext {
 
     // services
     pub executor: Arc<Executor>,
-    #[allow(dead_code)] // HACK this was triggered in Rust 1.79
     pub miner: Arc<Miner>,
     pub storage: Arc<StratusStorage>,
     pub consensus: Arc<dyn Consensus>,
diff --git a/src/eth/rpc/rpc_middleware.rs b/src/eth/rpc/rpc_middleware.rs
index 34af7e9e9..5bb90d112 100644
--- a/src/eth/rpc/rpc_middleware.rs
+++ b/src/eth/rpc/rpc_middleware.rs
@@ -34,6 +34,7 @@ use crate::eth::rpc::RpcClientApp;
 use crate::event_with;
 use crate::ext::from_json_str;
 use crate::ext::to_json_value;
+#[cfg(feature = "metrics")]
 use crate::if_else;
 use crate::infra::metrics;
 use crate::infra::tracing::new_cid;
@@ -164,6 +165,8 @@ impl<'a> Future for RpcResponse<'a> {
             // trace response
             let response_success = response.is_success();
             let response_result: JsonValue = from_json_str(response.as_result());
+
+            #[cfg_attr(not(feature = "metrics"), allow(unused_variables))]
             let (level, error_code) = match response_result
                 .get("error")
                 .and_then(|v| v.get("code"))
diff --git a/src/eth/storage/rocks/rocks_state.rs b/src/eth/storage/rocks/rocks_state.rs
index f506c0d0b..f01f53de6 100644
--- a/src/eth/storage/rocks/rocks_state.rs
+++ b/src/eth/storage/rocks/rocks_state.rs
@@ -151,6 +151,7 @@ impl RocksStorageState {
     /// Get the filename of the database path.
     ///
     /// Should be checked on creation.
+    #[cfg(feature = "metrics")]
     fn db_path_filename(&self) -> &str {
         self.db.path().file_name().unwrap().to_str().unwrap()
     }