diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index f588f8f..56f293e 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -28,7 +28,7 @@ jobs:
         id: tag
         run: |
           TIMESTAMP=$(date +%Y%m%d%H%M%S)
-          SHA=$(echo ${{ github.sha }} | cut -c1-7)
+          SHA=$(echo ${{ gitea.sha }} | cut -c1-7)
           echo "tag=${TIMESTAMP}-${SHA}" >> $GITHUB_OUTPUT
 
       - name: Build Docker image