diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0806f5a..7eb9f54 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,10 +50,7 @@ target_link_libraries(camera_to_rtsp
 
 # 运行时把 config.json 复制到 bin/ 目录
 add_custom_command(TARGET camera_to_rtsp POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E echo "Checking config.json..."
-    COMMAND ${CMAKE_COMMAND} -E test -e $<TARGET_FILE_DIR:camera_to_rtsp>/config.json
-        || ${CMAKE_COMMAND} -E copy
-            ${CMAKE_SOURCE_DIR}/config.json
-            $<TARGET_FILE_DIR:camera_to_rtsp>/config.json
+    COMMAND /bin/bash -c "if [ ! -f '$<TARGET_FILE_DIR:camera_to_rtsp>/config.json' ]; then cp '${CMAKE_SOURCE_DIR}/config.json' '$<TARGET_FILE_DIR:camera_to_rtsp>/config.json'; else echo 'config.json exists, skip copy'; fi"
 )
 
+