diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index ff57ad0..c0cc729 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -7,7 +7,7 @@ on:
 jobs:
 #───────────────── filtra qué dirs cambiaron ─────────────────
   filter:
-    runs-on: ubuntu-latest
+    runs-on: docker
     outputs:
       agent:  ${{ steps.paths.outputs.agent }}
       api:    ${{ steps.paths.outputs.api }}