diff --git a/slave.mk b/slave.mk
index ba146b20a111..1cc072a4b906 100644
--- a/slave.mk
+++ b/slave.mk
@@ -9,7 +9,7 @@ SHELL = /bin/bash
 USER = $(shell id -un)
 UID = $(shell id -u)
 GUID = $(shell id -g)
-SONIC_GET_VERSION=$(shell . functions.sh && sonic_get_version)
+SONIC_GET_VERSION=$(shell export BUILD_TIMESTAMP=$(BUILD_TIMESTAMP) && export BUILD_NUMBER=$(BUILD_NUMBER) && . functions.sh && sonic_get_version)
 
 .SECONDEXPANSION: