diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fa59421c..c06beba29 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,6 +59,7 @@ option( WITH_KF5Crash "Enable crash reporting with KCrash." ON )
 # **available** to `settings.conf`, not that they are used).
 #
 # Currently, no USE_<foo> variables exist.
+set( USE_services "" CACHE STRING "Select the services module to use" )
 
 ### Calamares application info
 #