diff -ruNa a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2024-04-26 00:46:07.510799606 +0200
+++ b/CMakeLists.txt	2024-04-26 00:46:28.566807090 +0200
@@ -95,6 +95,7 @@
 endif()
 
 ## Installation
+include(GNUInstallDirs)
 # install lib
 install(TARGETS ${PROJECT_NAME}
 		DESTINATION ${CMAKE_INSTALL_LIBDIR})