diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1ff8bd9db3..5f43174bcf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@ endif()
 # This is inserted into the Info.plist as well.
 set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15.0" CACHE STRING "")
 
-set(CMAKE_USER_MAKE_RULES_OVERRIDE "CMake/FlagsOverride.cmake")
+set(CMAKE_USER_MAKE_RULES_OVERRIDE "${CMAKE_CURRENT_SOURCE_DIR}/CMake/FlagsOverride.cmake")
 
 project(dolphin-emu)