diff --git a/.github/workflows/dataset-backup.yaml b/.github/workflows/dataset-backup.yaml
index de620719a..1c32163da 100644
--- a/.github/workflows/dataset-backup.yaml
+++ b/.github/workflows/dataset-backup.yaml
@@ -31,8 +31,7 @@ jobs:
           if [[ "${{ github.event.inputs.dataset }}" == 'all' ]]; then
             MATRIX=$(cat satellites.json)
           else
-            value[0] = ${{ github.event.inputs.dataset }}
-            MATRIX=${{toJSON(value)}}
+            MATRIX[0] = ${{ github.event.inputs.dataset }}
           fi
 
           echo "matrix=${MATRIX}" >> $GITHUB_OUTPUT