diff --git a/configure/CONFIG b/configure/CONFIG
index 82264f4c6..f41f1ff1a 100644
--- a/configure/CONFIG
+++ b/configure/CONFIG
@@ -87,7 +87,7 @@ endif
 # Include <top>/cfg/CONFIG* definitions from tops defined in RELEASE* files
 #
 ifneq ($(CONFIG),$(TOP)/configure)
-RELEASE_TOPS ?= $(shell $(PERL) $(TOOLS)/convertRelease.pl -T $(TOP) releaseTops )
+RELEASE_TOPS := $(shell $(CONVERTRELEASE) -T $(TOP) releaseTops)
 RELEASE_CFG_CONFIGS = $(foreach top, $(RELEASE_TOPS), $(wildcard $($(top))/cfg/CONFIG*))
 ifneq ($(RELEASE_CFG_CONFIGS),)
 include $(RELEASE_CFG_CONFIGS)
diff --git a/configure/CONFIG_APP_INCLUDE b/configure/CONFIG_APP_INCLUDE
index 3f4db904c..3951ed282 100644
--- a/configure/CONFIG_APP_INCLUDE
+++ b/configure/CONFIG_APP_INCLUDE
@@ -1,7 +1,7 @@
 export TOP
 export IOCAPPS
 
-RELEASE_TOPS = $(shell $(PERL) $(TOOLS)/convertRelease.pl -T $(TOP) releaseTops )
+RELEASE_TOPS := $(shell $(CONVERTRELEASE) -T $(TOP) releaseTops)
 
 ifneq ($(RELEASE_TOPS),)