diff --git a/.github/workflows/ingest-to-phylogenetic.yaml b/.github/workflows/ingest-to-phylogenetic.yaml
index 42216c4..2d52afa 100644
--- a/.github/workflows/ingest-to-phylogenetic.yaml
+++ b/.github/workflows/ingest-to-phylogenetic.yaml
@@ -96,7 +96,7 @@ jobs:
             key="${s3path#*/}"
 
             s3_hash="$(aws s3api head-object --no-sign-request --bucket "$bucket" --key "$key" --query Metadata.sha256sum --output text 2>/dev/null || echo "$no_hash")"
-            echo "${s3_hash}" >> ingest-output-sha256sum
+            echo "${s3_hash}" | tee -a ingest-output-sha256sum
           done
 
       - name: Check cache