diff --git a/main.yml b/main.yml
index 4d152c5..e17eab4 100644
--- a/main.yml
+++ b/main.yml
@@ -1,5 +1,8 @@
 ---
 - name: main task
   hosts: staging
+  vars:
+    build_root_abspath: "/home/dietpi/build/{{ ansible_date_time.iso8601_basic_short }}"
+    demobackend_version: "latest"
   roles:
-    - role: hello_world
+    - role: build_fastapi
\ No newline at end of file