diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87fa8a1..eddc23e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -663,7 +663,8 @@ if(MINGW)
 elseif(APPLE AND WITH_GUI)
     set(CPACK_GENERATOR "DragNDrop")
 else()
-    set(CPACK_PACKAGING_INSTALL_PREFIX "/usr/local")
+    set(CPACK_PACKAGING_INSTALL_PREFIX "/")
+    set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY OFF)
     set(CPACK_GENERATOR "TGZ")
 endif()