diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ee60e154..fcc4bd2e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 list(INSERT CMAKE_MODULE_PATH 0
-  "${CMAKE_SOURCE_DIR}/cmake")
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 include(CheckCCompilerFlag)
 include(CheckCXXCompilerFlag)
 include(CheckLinkerFlag)