1 files changed, 3 insertions, 0 deletions
diff --git a/src/nix-worker/nix-worker.cc b/src/nix-worker/nix-worker.cc
index 0052fbb7d..13cecf654 100644
--- a/src/nix-worker/nix-worker.cc
+++ b/src/nix-worker/nix-worker.cc
@@ -500,6 +500,9 @@ static void performOp(unsigned int clientVersion,
             logType = (LogType) readInt(from);
             printBuildTrace = readInt(from) != 0;
         }
+        if (GET_PROTOCOL_MINOR(clientVersion) >= 6) {
+            buildCores = readInt(from);
+        }
         startWork();
         stopWork();
         break;