diff --git a/cmake/external_libs/gflags.cmake b/cmake/external_libs/gflags.cmake
index cb9335e..f03a0b6 100755
--- a/cmake/external_libs/gflags.cmake
+++ b/cmake/external_libs/gflags.cmake
@@ -6,7 +6,7 @@ include(ExternalProject)
 
 if ((${CMAKE_INSTALL_PREFIX} STREQUAL /usr/local) OR
     (${CMAKE_INSTALL_PREFIX} STREQUAL "C:/Program Files (x86)/ascend"))
-    set(CMAKE_INSTALL_PREFIX ${METADEF_DIR}/output CACHE STRING "path for install()" FORCE)
+    set(CMAKE_INSTALL_PREFIX ${PARSER_DIR}/output CACHE STRING "path for install()" FORCE)
     message(STATUS "No install prefix selected, default to ${CMAKE_INSTALL_PREFIX}.")
 endif()