diff --git a/src/package_io/parse_input.star b/src/package_io/parse_input.star
index 72ccd0159..00be768e1 100644
--- a/src/package_io/parse_input.star
+++ b/src/package_io/parse_input.star
@@ -240,8 +240,7 @@ def enrich_mev_extra_params(parsed_arguments_dict, mev_prefix, mev_port):
 			participant["beacon_extra_params"].append("--builder.urls={0}".format(mev_url))
 		if participant["cl_client_type"] == "nimbus":
 			participant["validator_extra_params"].append("--payload-builder=true")
-			participant["beacon_extra_params"].append("--payload-builder=true")
-			participant["beacon_extra_params"].append("--payload-builder-uris={0}".format(mev_url))
+			participant["beacon_extra_params"].append("--payload-builder=true", "--payload-builder-url={0}".format(mev_url))
 		if participant["cl_client_type"] == "teku":
 			participant["validator_extra_params"].append("--validators-builder-registration-default-enabled=true")
 			participant["beacon_extra_params"].append("--builder-endpoint={0}".format(mev_url))