diff --git a/config/CONFIG_BASE b/config/CONFIG_BASE
index 3de75e997..b8f0d0b02 100644
--- a/config/CONFIG_BASE
+++ b/config/CONFIG_BASE
@@ -43,6 +43,10 @@ EPICS_BASE = $(TOP)
 # EPICS include config file
 include $(EPICS_BASE)/config/CONFIG
 
+ifdef INSTALL_LOCATION_BASE
+INSTALL_LOCATION = $(INSTALL_LOCATION_BASE)
+endif
+
 EPICS_BASE = $(INSTALL_LOCATION)
 
 #