use KF_INSTALL_TARGETS_DEFAULT_ARGS

src/calendarextras/CMakeLists.txt

@@ -28,5 +28,5 @@ endif()
 target_link_libraries(KCalendarCoreExtras PUBLIC KF5::CalendarCore)
 
 if (ANDROID)
-    install(TARGETS KCalendarCoreExtras ${KF5_INSTALL_TARGETS_DEFAULT_ARGS})
+    install(TARGETS KCalendarCoreExtras ${KF_INSTALL_TARGETS_DEFAULT_ARGS})
 endif()

src/solidextras/CMakeLists.txt

@@ -49,4 +49,4 @@ else ()
     endif()
 endif()
 
-install(TARGETS SolidExtras ${KF5_INSTALL_TARGETS_DEFAULT_ARGS})
+install(TARGETS SolidExtras ${KF_INSTALL_TARGETS_DEFAULT_ARGS})