diff --git a/build.sh b/build.sh
index 213be84..c44e6db 100755
--- a/build.sh
+++ b/build.sh
@@ -145,6 +145,7 @@ fi
 export USE_QEMU="${USE_QEMU:-0}"
 export IMG_DATE="${IMG_DATE:-"$(date +%Y-%m-%d)"}"
 export IMG_FILENAME="${IMG_FILENAME:-"${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}"}"
+export ZIP_FILENAME="${ZIP_FILENAME:-"image_${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}"}"
 
 BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 export SCRIPT_DIR="${BASE_DIR}/scripts"
diff --git a/export-image/04-finalise/01-run.sh b/export-image/04-finalise/01-run.sh
index eee9c5c..f5a5fd8 100755
--- a/export-image/04-finalise/01-run.sh
+++ b/export-image/04-finalise/01-run.sh
@@ -74,10 +74,10 @@ unmount_image "${IMG_FILE}"
 
 mkdir -p "${DEPLOY_DIR}"
 
-rm -f "${DEPLOY_DIR}/image_${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}.zip"
+rm -f "${DEPLOY_DIR}/${ZIP_FILENAME}.zip"
 
 pushd "${STAGE_WORK_DIR}" > /dev/null
-zip "${DEPLOY_DIR}/image_${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}.zip" \
+zip "${DEPLOY_DIR}/${ZIP_FILENAME}.zip" \
 	"$(basename "${IMG_FILE}")"
 popd > /dev/null