diff --git a/CMakeLists.txt b/CMakeLists.txt
index db82b89..97e0567 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,7 +77,7 @@ install(FILES ${CMAKE_BINARY_DIR}/config.h
 )
 
 include(CMakePackageConfigHelpers)
-set(CONFIG_PACKAGE_LOCATION "${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/cmake")
+set(CONFIG_PACKAGE_LOCATION "${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/cmake" CACHE PATH "CMake configuration file location")
 
 write_basic_package_version_file(
 	${CMAKE_BINARY_DIR}/BcMatroska2ConfigVersion.cmake