diff --git a/.github/workflows/build-test-deploy.yml b/.github/workflows/build-test-deploy.yml
index 762a7b1..b0d39c5 100644
--- a/.github/workflows/build-test-deploy.yml
+++ b/.github/workflows/build-test-deploy.yml
@@ -30,6 +30,7 @@ jobs:
     env:
       BASE_DISTRO: ${{ matrix.base_distro }}
       REPO: crops/poky
+      DEFAULT_DISTRO: ubuntu-18.04
       DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
       DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}