diff --git a/backfill.sh b/backfill.sh
new file mode 100755
index 0000000..f79aa5b
--- /dev/null
+++ b/backfill.sh
@@ -0,0 +1,44 @@
+#!/run/current-system/sw/bin/bash
+
+set -e
+
+# Ensure two arguments are provided: paths file and settings file
+if [[ "$#" -ne 2 ]]; then
+    echo "Usage: $0 PATHS_FILE SETTINGS_FILE"
+    exit 1
+fi
+
+PATHS_FILE="$1"
+SETTINGS_FILE="$2"
+
+# Ensure the paths file exists
+if [[ ! -f "$PATHS_FILE" ]]; then
+    echo "Error: Paths file '$PATHS_FILE' not found!"
+    exit 1
+fi
+
+# Ensure the settings file exists
+if [[ ! -f "$SETTINGS_FILE" ]]; then
+    echo "Error: Settings file '$SETTINGS_FILE' not found!"
+    exit 1
+fi
+
+PROG="./dist-newstyle/build/x86_64-linux/ghc-9.2.8/chan-delorean-0.0.1/x/chan-delorean/build/chan-delorean/chan-delorean"
+
+# Ensure your_program is compiled and available
+if ! command -v $PROG >/dev/null; then
+    echo "Error: your_program is not compiled or not in the PATH!"
+    exit 1
+fi
+
+# Loop through each line of the paths file
+while IFS= read -r BACKUP_PATH; do
+    # Update backup_read_root in the settings file using sed
+    sed -e 's|\("backup_read_root": \)".*"|\1"'"$BACKUP_PATH"'"|' "$SETTINGS_FILE" > "temp_$SETTINGS_FILE"
+    
+    # Run the Haskell program with the updated settings file
+    $PROG +RTS -N2 -RTS "temp_$SETTINGS_FILE"
+done < "$PATHS_FILE"
+
+# Optionally, remove the temporary settings file
+rm "temp_$SETTINGS_FILE"