diff --git a/.drone.yml b/.drone.yml
index a2b9793..03c9878 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -10,8 +10,8 @@ steps:
   - name: debug
     image: alpine
     commands:
-      - "echo 'Repository: $DOCKER_REPO'"
-      - "echo 'Git commit: $DRONE_COMMIT_SHA'"
+      - 'echo "Repository: ${DOCKER_REPO}"'
+      - 'echo "Git commit: ${DRONE_COMMIT_SHA:0:8}"'
 
   - name: publish:commit_sha
     image: plugins/docker