diff --git a/src/sonic-build-hooks/scripts/buildinfo_base.sh b/src/sonic-build-hooks/scripts/buildinfo_base.sh
index 6a55524660..d46ffec183 100755
--- a/src/sonic-build-hooks/scripts/buildinfo_base.sh
+++ b/src/sonic-build-hooks/scripts/buildinfo_base.sh
@@ -17,7 +17,7 @@ REPR_MIRROR_URL_PATTERN='http:\/\/packages.trafficmanager.net\/debian'
 
 URL_PREFIX=$(echo "${PACKAGE_URL_PREFIX}" | sed -E "s#(//[^/]*/).*#\1#")
 
-if [ $USER != 'root' ] && [ -n $(which sudo) ];then
+if [ "$(whoami)" != "root" ] && [ -n "$(which sudo)" ];then
     SUDO=sudo
 else
     SUDO=''