diff --git a/hack/gen_protoc.sh b/hack/gen_protoc.sh
index 03d5c33c1..0f9ce2ea1 100644
--- a/hack/gen_protoc.sh
+++ b/hack/gen_protoc.sh
@@ -9,15 +9,15 @@ PROTO_SRC=$@
 
 arch=$(get_arch)
 
+# if protoc-c is 1.4.x
 if protoc-c --version | grep -q -E "protobuf-c 1\.4\.[0-9]"; then
     protoc-c --proto_path=$PROTO_PATH --c_out=. $PROTO_SRC
 else
     echo "Generate proto files in docker"
-    echo $PROTO_PATH
-    echo $PROTO_SRC
     docker run --rm \
         -v $ROOT_DIR:/kmesh \
-        --name kmesh-build "ghcr.io/kmesh-net/kmesh-build-${arch}:latest" \
-        cd /kmesh/api && protoc-c --proto_path=$PROTO_PATH --c_out=. $PROTO_SRC
+        --name kmesh-build \
+        ghcr.io/kmesh-net/kmesh-build-${arch}:latest \
+        sh -c "cd /kmesh/api && protoc-c --proto_path=$PROTO_PATH --c_out=. $PROTO_SRC"
 fi