diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index fcd3d2b3ac..de73dfa3ee 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -33,4 +33,4 @@ jobs:
           push: true
           tags: |
             ghcr.io/misskeyio/misskey:latest
-            ghcr.io/misskeyio/misskey:${FORMATTED_BRANCH_NAME}
+            ghcr.io/misskeyio/misskey:${{ env.FORMATTED_BRANCH_NAME }}