diff --git a/App/tools/driver.makefile b/App/tools/driver.makefile
index 62b4aa3ca1b08c312514345701547de7b2adbc8f..3eb17cfa617952ce16b6c77f4fa1d8b97e5d489c 100644
--- a/App/tools/driver.makefile
+++ b/App/tools/driver.makefile
@@ -388,8 +388,8 @@ endef
 $(foreach a,${CROSS_COMPILER_TARGET_ARCHS},$(foreach l,$(LINK_$a),$(eval $(call MAKELINKDIRS,$l,$a))))
 
 install::
-	@test ! -d ${MODULE_LOCATION}/R${EPICSVERSION} || \
-        (echo -e "Error: ${MODULE_LOCATION}/R${EPICSVERSION} already exists.If you really want to overwrite then uninstall first."; false)
+	@test ! -d ${MODULE_LOCATION}/R${EPICSVERSION}/lib/${T_A} || \
+        (echo -e "Error: ${MODULE_LOCATION}/R${EPICSVERSION}/lib/${T_A} already exists.If you really want to overwrite then uninstall first."; false)
 
 install build::
 # Delete old build if INSTBASE has changed.