[Nexus 7 (2013) Android Development] Scott:
Here is the appropriate updater script for this device...

If you need help let me know...

I had to try it three times to get it right...

format("ext4", "EMMC", "/dev/block/mmcblk0p22", "0", "/system");
mount("ext4", "EMMC", "/dev/block/mmcblk0p22", "/system");
ui_print("Installing System...");
package_extract_dir("system", "/system");
ui_print("Setting Symlinks...");
symlink("dumpstate", "/system/bin/dumpcrash");
symlink("toolbox", "/system/bin/cat");
symlink("toolbox", "/system/bin/chmod");
symlink("toolbox", "/system/bin/chown");
symlink("toolbox", "/system/bin/cmp");
symlink("debuggerd", "/system/bin/csview");
symlink("toolbox", "/system/bin/date");
symlink("toolbox", "/system/bin/dd");
symlink("toolbox", "/system/bin/df");
symlink("toolbox", "/system/bin/dmesg");
symlink("toolbox", "/system/bin/getevent");
symlink("toolbox", "/system/bin/getprop");
symlink("toolbox", "/system/bin/hd");
symlink("toolbox", "/system/bin/id");
symlink("toolbox", "/system/bin/ifconfig");
symlink("toolbox", "/system/bin/iftop");
symlink("toolbox", "/system/bin/insmod");
symlink("toolbox", "/system/bin/ioctl");
symlink("toolbox", "/system/bin/ionice");
symlink("toolbox", "/system/bin/kill");
symlink("toolbox", "/system/bin/ln");
symlink("toolbox", "/system/bin/log");
symlink("toolbox", "/system/bin/ls");
symlink("toolbox", "/system/bin/lsmod");
symlink("toolbox", "/system/bin/lsof");
symlink("toolbox", "/system/bin/mkdir");
symlink("toolbox", "/system/bin/mount");
symlink("toolbox", "/system/bin/mv");
symlink("toolbox", "/system/bin/nandread");
symlink("toolbox", "/system/bin/netstat");
symlink("toolbox", "/system/bin/newfs_msdos");
symlink("toolbox", "/system/bin/notify");
symlink("toolbox", "/system/bin/printenv");
symlink("toolbox", "/system/bin/ps");
symlink("toolbox", "/system/bin/reboot");
symlink("toolbox", "/system/bin/renice");
symlink("toolbox", "/system/bin/rm");
symlink("toolbox", "/system/bin/rmdir");
symlink("toolbox", "/system/bin/rmmod");
symlink("toolbox", "/system/bin/route");
symlink("toolbox", "/system/bin/schedtop");
symlink("toolbox", "/system/bin/sendevent");
symlink("toolbox", "/system/bin/setconsole");
symlink("toolbox", "/system/bin/setprop");
symlink("mksh", "/system/bin/sh");
symlink("toolbox", "/system/bin/sleep");
symlink("toolbox", "/system/bin/smd");
symlink("toolbox", "/system/bin/start");
symlink("toolbox", "/system/bin/stop");
symlink("toolbox", "/system/bin/sync");
symlink("toolbox", "/system/bin/top");
symlink("toolbox", "/system/bin/touch");
symlink("toolbox", "/system/bin/umount");
symlink("toolbox", "/system/bin/uptime");
symlink("toolbox", "/system/bin/vmstat");
symlink("toolbox", "/system/bin/watchprops");
symlink("toolbox", "/system/bin/wipe");
symlink("/data/misc/wifi/WCNSS_qcom_wlan_nv.bin", "/system/vendor/firmware/wlan/prima/WCNSS_qcom_wlan_nv.bin");
symlink("/data/misc/wifi/WCNSS_qcom_cfg.ini", "/system/vendor/firmware/wlan/prima/WCNSS_qcom_cfg.ini");
symlink("/system/fonts/Roboto-Bold.ttf", "/system/fonts/DroidSans-Bold.ttf");
symlink("/system/fonts/Roboto-Regular.ttf", "/system/fonts/DroidSans.ttf");
symlink("/factory/hdcp.keys", "/system/vendor/firmware/hdcp.keys");
ui_print("Setting Permissions...");
set_perm_recursive(0, 0, 0755, 0644, "/system");
set_perm_recursive(0, 0, 0777, 0777, "/system/etc/init.d");
set_perm_recursive(0, 2000, 0755, 0755, "/system/bin");
set_perm(0, 3003, 06755, "/system/bin/ip");
set_perm(0, 3003, 02750, "/system/bin/netcfg");
set_perm(0, 3004, 02755, "/system/bin/ping");
set_perm(0, 2000, 06750, "/system/bin/run-as");
set_perm_recursive(1002, 1002, 0755, 0440, "/system/etc/bluetooth");
set_perm(0, 0, 0755, "/system/etc/bluetooth");
set_perm(1000, 1000, 0640, "/system/etc/bluetooth/auto_pair_devlist.conf");
set_perm(1014, 2000, 0550, "/system/etc/dhcpcd/dhcpcd-run-hooks");
set_perm_recursive(0, 0, 0755, 0555, "/system/etc/ppp");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor");
set_perm_recursive(0, 0, 0755, 0644, "/system/vendor/firmware");
set_perm(0, 2000, 0755, "/system/vendor/firmware/discretix");
set_perm(0, 2000, 0755, "/system/vendor/firmware");
set_perm(0, 2000, 0755, "/system/vendor/lib");
set_perm_recursive(0, 0, 0755, 0644, "/system/vendor/firmware/wifi");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor/lib/drm");
set_perm(0, 0, 0644, "/system/vendor/lib/drm/libdrmwvmplugin.so");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor/firmware/wlan");
set_perm(0, 0, 0644, "/system/vendor/firmware/wlan/prima/WCNSS_cfg.dat");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor/pittpatt");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/detection/multi_pose_face_landmark_detectors.7/left_eye-y0-yi45-p0-pi45-r0-ri20.lg_32.bin");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/detection/multi_pose_face_landmark_detectors.7/nose_base-y0-yi45-p0-pi45-r0-ri20.lg_32.bin");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/detection/multi_pose_face_landmark_detectors.7/right_eye-y0-yi45-p0-pi45-r0-ri20.lg_32-2.bin");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/detection/yaw_roll_face_detectors.6/head-y0-yi45-p0-pi45-r0-ri30.4a-v24.bin");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/detection/yaw_roll_face_detectors.6/head-y0-yi45-p0-pi45-rn30-ri30.5-v24.bin");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/detection/yaw_roll_face_detectors.6/head-y0-yi45-p0-pi45-rp30-ri30.5-v24.bin");
set_perm(0, 0, 0644, "/system/vendor/pittpatt/models/recognition/face.face.y0-y0-22-b-N.bin");
set_perm_recursive(0, 2000, 0755, 0755, "/system/xbin");
ui_print("Installing Root and Busybox...");
set_perm(0, 1000, 0755, "/system/xbin/busybox");
symlink("/system/xbin/busybox", "/system/bin/busybox");
run_program("/system/xbin/busybox", "--install", "-s", "/system/xbin");
set_perm(0, 0, 0777, "/system/bin/.ext");
set_perm(0, 0, 06755, "/system/bin/.ext/.su");
set_perm(0, 0, 06755, "/system/xbin/su");
set_perm(0, 0, 06755, "/system/xbin/daemonsu");
set_perm(0, 0, 0644, "/system/app/Superuser.apk");
symlink("/system/xbin/su", "/system/bin/su");
show_progress(0.1, 10);
show_progress(0.2, 0);
ui_print("Installing boot.img..");
package_extract_file("boot.img", "/dev/block/mmcblk0p14");
show_progress(0.2, 10);
unmount("/system");
ui_print("Done!");

And if you use my updater script hit thanks ;c)