diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 7814835..2432a2e 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -22,7 +22,7 @@ jobs:
 
           FULL_BUILDER_SHA="${{ gitea.sha }}"
           SHORT_BUILDER_SHA="${FULL_BUILDER_SHA:0:7}"
-          echo "BUILDER_SHA_COMMIT=${SHORT_SHA}" >> $GITEA_OUTPUT
+          echo "BUILDER_SHA_COMMIT=${SHORT_BUILDER_SHA}" >> $GITEA_OUTPUT
       - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Log in to built-in registry