diff --git a/Meta/build-image-grub.sh b/Meta/build-image-grub.sh
index 6c1a428d24..fff4f64eb5 100755
--- a/Meta/build-image-grub.sh
+++ b/Meta/build-image-grub.sh
@@ -9,6 +9,8 @@ die() {
 
 if [ "$(id -u)" != 0 ]; then
     exec sudo -E -- "$0" "$@" || die "this script needs to run as root"
+else
+    : "${SUDO_UID:=0}" "${SUDO_GID:=0}"
 fi
 
 grub=$(command -v grub-install 2>/dev/null) || true
diff --git a/Meta/build-image-qemu.sh b/Meta/build-image-qemu.sh
index 578a56c4b1..86d6d271d6 100755
--- a/Meta/build-image-qemu.sh
+++ b/Meta/build-image-qemu.sh
@@ -9,6 +9,8 @@ die() {
 
 if [ "$(id -u)" != 0 ]; then
     exec sudo -E -- "$0" "$@" || die "this script needs to run as root"
+else
+    : "${SUDO_UID:=0}" "${SUDO_GID:=0}"
 fi
 
 if [ "$(uname -s)" = "Darwin" ]; then