struct bundle_header header;
        const char *cmd, *bundle_file;
        int bundle_fd = -1;
-       char buffer[PATH_MAX];
 
        if (argc < 3)
                usage(builtin_bundle_usage);
 
        cmd = argv[1];
-       bundle_file = argv[2];
+       bundle_file = prefix_filename(prefix, argv[2]);
        argc -= 2;
        argv += 2;
 
-       if (prefix && bundle_file[0] != '/') {
-               snprintf(buffer, sizeof(buffer), "%s/%s", prefix, bundle_file);
-               bundle_file = buffer;
-       }
-
        memset(&header, 0, sizeof(header));
        if (strcmp(cmd, "create") && (bundle_fd =
                                read_bundle_header(bundle_file, &header)) < 0)