diff --git a/configure/CONFIG_BASE b/configure/CONFIG_BASE
index 562a0c4d3..1a4d6eff0 100644
--- a/configure/CONFIG_BASE
+++ b/configure/CONFIG_BASE
@@ -56,15 +56,15 @@ BASE_CPPFLAGS += $(OSITHREAD_DEFAULT_STACK_FLAGS_$(OSITHREAD_USE_DEFAULT_STACK))
 #---------------------------------------------------------------
 # Epics base build tools and tool flags
 
-MAKEBPT                    = $(EPICS_BASE_HOST_BIN)/makeBpt$(HOSTEXE)
-DBEXPAND                   = $(EPICS_BASE_HOST_BIN)/dbExpand$(HOSTEXE)
-DBTORECORDTYPEH            = $(EPICS_BASE_HOST_BIN)/dbToRecordtypeH$(HOSTEXE)
-DBTOMENUH                  = $(EPICS_BASE_HOST_BIN)/dbToMenuH$(HOSTEXE)
+MAKEBPT                    = $(call PATH_FILTER, $(EPICS_BASE_HOST_BIN)/makeBpt$(HOSTEXE))
+DBEXPAND                   = $(call PATH_FILTER, $(EPICS_BASE_HOST_BIN)/dbExpand$(HOSTEXE))
+DBTORECORDTYPEH            = $(call PATH_FILTER, $(EPICS_BASE_HOST_BIN)/dbToRecordtypeH$(HOSTEXE))
+DBTOMENUH                  = $(call PATH_FILTER, $(EPICS_BASE_HOST_BIN)/dbToMenuH$(HOSTEXE))
 REGISTERRECORDDEVICEDRIVER = $(PERL) $(EPICS_BASE_HOST_BIN)/registerRecordDeviceDriver.pl
 
 # private versions of lex/yacc from EPICS
-EYACC = $(EPICS_BASE_HOST_BIN)/antelope$(HOSTEXE)
-ELEX = $(EPICS_BASE_HOST_BIN)/e_flex$(HOSTEXE) -S$(EPICS_BASE)/include/flex.skel.static
+EYACC = $(call PATH_FILTER, $(EPICS_BASE_HOST_BIN)/antelope$(HOSTEXE))
+ELEX = $(call PATH_FILTER, $(EPICS_BASE_HOST_BIN)/e_flex$(HOSTEXE)) -S$(EPICS_BASE)/include/flex.skel.static
 
 YACC  = $(EYACC)
 LEX   = $(ELEX)