diff --git a/App/tools/driver.makefile b/App/tools/driver.makefile
index 256833a..98a8b18 100644
--- a/App/tools/driver.makefile
+++ b/App/tools/driver.makefile
@@ -303,6 +303,7 @@ endef
 
 # You can add more UI rules following this pattern:
 #$(eval $(call INSTALL_UI_RULE,VARIABLE,installdir,sourcedefaultlocation))
+CONFIGBASE ?= ${EPICS_MODULES}
 $(eval $(call INSTALL_UI_RULE,QT,${CONFIGBASE}/qt,qt/*))
 
 else # EPICSVERSION