diff --git a/lib/yashchiki/build_sandbox.sh b/lib/yashchiki/build_sandbox.sh
index dc4334ed297c2e76e6291ffb872c36b02ec98b8f..17a80b5f4529810c6946019cdb7934aa1067d76f 100755
--- a/lib/yashchiki/build_sandbox.sh
+++ b/lib/yashchiki/build_sandbox.sh
@@ -3,6 +3,11 @@
 set -euo pipefail
 shopt -s inherit_errexit 2>/dev/null || true
 
+if [ -z "${YASHCHIKI_ENABLE_STAGE_BUILD_BASE:-}" ]; then
+    echo "Skipping stage build-base."
+    exit 0
+fi
+
 # set generic locale for building
 export LANG=C.UTF-8
 export LC_ALL=C.UTF-8