Map<String, FileSystemLocationSnapshot> previousIndex = indexByAbsolutePath(previous);
        return filterSnapshot(current, (currentSnapshot, isRoot) ->
            // Include only outputs that we already considered outputs after the previous execution
            previousIndex.containsKey(currentSnapshot.getAbsolutePath())
        );

            return Optional.of(read(location));
        } else {
            FileSystemSnapshot filteredSnapshot = readSnapshotFromLocation(location,
                snapshot -> FileSystemSnapshotFilter.filterSnapshot(filter.getAsSnapshotPredicate(), snapshot),
                () -> {
                    FileSystemLocationSnapshot snapshot = snapshot(location, filter);
                    return snapshot.getType() == FileType.Directory