It's required in the calendar plugin.
@ -34,6 +34,7 @@ include(ECMConfiguredInstall)
include(ECMGenerateDBusServiceFile)
include(ECMFindQmlModule)
include(ECMGenerateExportHeader)
include(ECMGenerateQmlTypes)
find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Svg Widgets Quick QuickWidgets Concurrent Test Network)
find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS