diff --git a/lodestar/run.sh b/lodestar/run.sh
index b230db0e..0450f71d 100755
--- a/lodestar/run.sh
+++ b/lodestar/run.sh
@@ -54,6 +54,15 @@ if [ -f /home/charon/vc-config/proposer-config.json ]; then
             proposer_config: {},
             default_config: {fee_recipient: d.fee_recipient, builder: {gas_limit: d.gas_limit}},
         };
+        if (d.builder) {
+            // Per-entry override keys match the keymanager JSON format, pass through verbatim.
+            Object.assign(out.default_config.builder, {
+                min_bid: d.builder.min_bid,
+                boost_factor: d.builder.builder_boost_factor,
+                max_execution_payment: d.builder.max_execution_payment,
+                builders: d.builder.builders,
+            });
+        }
         for (const [pubkey, entry] of Object.entries(src.proposer_config || {})) {
             out.proposer_config[pubkey] = {
                 fee_recipient: entry.fee_recipient ?? d.fee_recipient,
diff --git a/prysm/run.sh b/prysm/run.sh
index c937c7e0..eec11e2e 100755
--- a/prysm/run.sh
+++ b/prysm/run.sh
@@ -43,21 +43,26 @@ echo "Imported all keys"
 
 # Render Prysm's proposer settings from the charon-generated canonical config when available:
 # entries only carry fields diverging from default_config, absent fields fall back to it.
+# Builder configuration renders as the v2 schema, inherited per key from default_config.
 PROPOSER_SETTINGS=()
 if [[ -f /home/charon/vc-config/proposer-config.json ]]; then
     echo "proposer-config.json found, rendering prysm proposer settings"
     jq --argjson enabled "${BUILDER_API_ENABLED}" '
         .default_config as $d |
+        ($d.builder != null) as $b |
         {
-            proposer_config: (.proposer_config | map_values({
-                fee_recipient: (.fee_recipient // $d.fee_recipient),
-                builder: {enabled: $enabled, gas_limit: (.gas_limit // $d.gas_limit)}
-            })),
-            default_config: {
-                fee_recipient: $d.fee_recipient,
-                builder: {enabled: $enabled, gas_limit: $d.gas_limit}
-            }
-        }' /home/charon/vc-config/proposer-config.json >/tmp/prysm-proposer-settings.json
+            proposer_config: (.proposer_config | map_values(
+                {fee_recipient: (.fee_recipient // $d.fee_recipient)}
+                + (if $b then {gas_limit: (.gas_limit // $d.gas_limit)} else {} end)
+                + {builder: {enabled: $enabled, gas_limit: (.gas_limit // $d.gas_limit)}}
+            )),
+            default_config: (
+                {fee_recipient: $d.fee_recipient}
+                + (if $b then {gas_limit: $d.gas_limit} else {} end)
+                + {builder: ({enabled: $enabled, gas_limit: $d.gas_limit} + ($d.builder // {}))}
+            )
+        }
+        + (if $b then {version: 2} else {} end)' /home/charon/vc-config/proposer-config.json >/tmp/prysm-proposer-settings.json
     PROPOSER_SETTINGS+=(--proposer-settings-file="/tmp/prysm-proposer-settings.json")
 else
     echo "proposer-config.json not found, running without proposer settings"