diff --git a/.github/workflows/dataset-backup.yaml b/.github/workflows/dataset-backup.yaml
index 2646f10e9..ce53eacbf 100644
--- a/.github/workflows/dataset-backup.yaml
+++ b/.github/workflows/dataset-backup.yaml
@@ -43,7 +43,7 @@ jobs:
     name: Backup dataset
     strategy:
       matrix:
-        dataset: ${{ (github.event.inputs.dataset != 'all'  && join(github.event.inputs.dataset)) || fromJson(needs.read-satellites.outputs.matrix) }}
+        dataset: ${{ (github.event.inputs.dataset != 'all'  && [github.event.inputs.dataset]) || fromJson(needs.read-satellites.outputs.matrix) }}
     steps:
       - uses: actions/checkout@v3
       - name: Install pnpm 📦