diff --git a/mev-build-rs/src/auctioneer/service.rs b/mev-build-rs/src/auctioneer/service.rs
index ae3f1e2d..4e2e074a 100644
--- a/mev-build-rs/src/auctioneer/service.rs
+++ b/mev-build-rs/src/auctioneer/service.rs
@@ -91,7 +91,7 @@ fn prepare_submission(
                 signature,
             })
         }
-        other => unreachable!("fork {other} is not reachable from this type"),
+        fork => return Err(Error::UnsupportedFork(fork)),
     };
     Ok(submission)
 }
diff --git a/mev-build-rs/src/compat.rs b/mev-build-rs/src/compat.rs
index fee3aab9..12d6b646 100644
--- a/mev-build-rs/src/compat.rs
+++ b/mev-build-rs/src/compat.rs
@@ -3,7 +3,7 @@ use ethereum_consensus::{
     crypto::{KzgCommitment, KzgProof},
     primitives::{Bytes32, ExecutionAddress},
     ssz::prelude::{ByteList, ByteVector, SimpleSerializeError, U256},
-    Error as ConsensusError, Fork,
+    Fork,
 };
 use mev_rs::types::{BlobsBundle, ExecutionPayload};
 use reth::primitives::{Address, BlobTransactionSidecar, Bloom, SealedBlock, B256};
@@ -106,7 +106,7 @@ pub fn to_execution_payload(value: &SealedBlock, fork: Fork) -> Result<Execution
             };
             Ok(ExecutionPayload::Electra(payload))
         }
-        fork => Err(Error::Consensus(ConsensusError::UnsupportedFork(fork))),
+        fork => Err(Error::UnsupportedFork(fork)),
     }
 }
 
diff --git a/mev-build-rs/src/error.rs b/mev-build-rs/src/error.rs
index d48e323f..7c59ae39 100644
--- a/mev-build-rs/src/error.rs
+++ b/mev-build-rs/src/error.rs
@@ -1,10 +1,12 @@
 use alloy_signer_wallet::WalletError;
-use ethereum_consensus::Error as ConsensusError;
+use ethereum_consensus::{Error as ConsensusError, Fork};
 use reth::payload::error::PayloadBuilderError;
 use thiserror::Error;
 
 #[derive(Error, Debug)]
 pub enum Error {
+    #[error("fork {0} is not supported for this operation")]
+    UnsupportedFork(Fork),
     #[error(transparent)]
     Consensus(#[from] ConsensusError),
     #[error(transparent)]