diff --git a/CMakeLists.txt b/CMakeLists.txt
index 164be96112..28baffb89a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 ## Author: Hank Anderson <hank@statease.com>
 ##
 
-cmake_minimum_required(VERSION 3.16.0)
+cmake_minimum_required(VERSION 3.21.0)
 
 set (CMAKE_ASM_SOURCE_FILE_EXTENSIONS "S")
 project(OpenBLAS C ASM)
diff --git a/cmake/prebuild.cmake b/cmake/prebuild.cmake
index 61ed48c000..fc7f24e7c1 100644
--- a/cmake/prebuild.cmake
+++ b/cmake/prebuild.cmake
@@ -1605,7 +1605,8 @@ endif ()
     "#define GEMM_MULTITHREAD_THRESHOLD\t${GEMM_MULTITHREAD_THRESHOLD}\n")
   # Move to where gen_config_h would place it
   file(MAKE_DIRECTORY ${TARGET_CONF_DIR})
-  file(RENAME ${TARGET_CONF_TEMP} "${TARGET_CONF_DIR}/${TARGET_CONF}")
+  file(COPY_FILE "${TARGET_CONF_TEMP}" "${TARGET_CONF_DIR}/${TARGET_CONF}" ONLY_IF_DIFFERENT)
+  file(REMOVE "${TARGET_CONF_TEMP}")
 
 else(NOT CMAKE_CROSSCOMPILING)
   # compile getarch