Build not triggering

.drone.yml

@@ -3,9 +3,9 @@ type: docker
 name: chessboard_builder
 
 trigger:
-  ref:
+  event:
-    include:
+    - tag
-      - refs/tags/builder-v*
+    - custom
 
 steps:
   - name: docker
@@ -18,7 +18,11 @@ steps:
         from_secret: docker_password
       tags:
         - latest
-        - ${DRONE_TAG##builder-v}
+        - ${DRONE_TAG##"builder-v"}
+    when:
+      ref:
+        include:
+          - refs/tags/builder-v*
 
 
 ---