Index: /var/tmp/portage/dev-db/mariadb-10.4.6/work/mysql/CMakeLists.txt
===================================================================
--- .orig/mysql/CMakeLists.txt
+++ mysql/CMakeLists.txt
@@ -358,7 +358,7 @@ ADD_DEFINITIONS(-DHAVE_CONFIG_H)
 IF(_FILE_OFFSET_BITS)
   ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS})
 ENDIF()
-INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR}/include)
+INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/include ${CMAKE_CURRENT_BINARY_DIR}/include)
 
 # Add bundled or system zlib.
 MYSQL_CHECK_ZLIB_WITH_COMPRESS()