diff --git a/src/makeBaseExt/top/configure/CONFIG_EXTENSIONS b/src/makeBaseExt/top/configure/CONFIG_EXTENSIONS
index 97da25ee7..2cd71784f 100644
--- a/src/makeBaseExt/top/configure/CONFIG_EXTENSIONS
+++ b/src/makeBaseExt/top/configure/CONFIG_EXTENSIONS
@@ -27,5 +27,9 @@ endif
 #  Site specific host-target combination definitions
 -include $(TOP)/configure/os/CONFIG_SITE.$(EPICS_HOST_ARCH).$(T_A)
 
+ifdef T_A
+-include $(TOP)/configure/O.$(T_A)/CONFIG_APP_INCLUDE
+endif
+
 endif
 
diff --git a/src/makeBaseExt/top/configure/Makefile b/src/makeBaseExt/top/configure/Makefile
index 16168e3b3..5b1e45ab3 100644
--- a/src/makeBaseExt/top/configure/Makefile
+++ b/src/makeBaseExt/top/configure/Makefile
@@ -4,5 +4,7 @@ TOP=..
 
 include $(TOP)/configure/CONFIG
 
+TARGETS = $(CONFIG_TARGETS)
+
 include $(TOP)/configure/RULES
 
diff --git a/src/makeBaseExt/top/configure/RELEASE b/src/makeBaseExt/top/configure/RELEASE
index bcd07569e..f6a5e6a0e 100644
--- a/src/makeBaseExt/top/configure/RELEASE
+++ b/src/makeBaseExt/top/configure/RELEASE
@@ -3,3 +3,4 @@
 # Location of external products
 EPICS_BASE=_EPICS_BASE_
 TEMPLATE_TOP=_TEMPLATE_TOP_
+EPICS_EXTENSIONS = $(EPICS_BASE)/../extensions