pi@retropie:~ $ sudo ~/RetroPie-Setup/retropie_packages.sh xpad remove

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Removing 'xpad' : Updated Xpad Linux Kernel driver
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-------- Uninstall Beginning --------
Module:  xpad
Version: 0.4
Kernel:  4.4.38-v7+ (armv7l)
-------------------------------------

Status: Before uninstall, this module version was ACTIVE on this kernel.

xpad.ko:
 - Uninstallation
   - Deleting from: /lib/modules/4.4.38-v7+/extra/
 - Original module
   - Archived original module found in the DKMS tree
   - Moving it to: /lib/modules/4.4.38-v7+/extra/
depmod.....

Removing original_module from DKMS tree for kernel 4.4.38-v7+ (armv7l)

DKMS: uninstall completed.

------------------------------
Deleting module version: 0.4
completely from the DKMS tree.
------------------------------
Done.
/opt/retropie/supplementary/xpad /home/pi
Removed directory /opt/retropie/supplementary/xpad
/home/pi
pi@retropie:~ $ sudo ~/RetroPie-Setup/retropie_packages.sh xpad

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Installing dependencies for 'xpad' : Updated Xpad Linux Kernel driver
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/home/pi/RetroPie-Setup/tmp/build/xpad /home/pi

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Getting sources for 'xpad' : Updated Xpad Linux Kernel driver
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git clone --recursive --depth 1 "https://github.com/paroj/xpad.git" "/opt/retropie/supplementary/xpad"
Cloning into '/opt/retropie/supplementary/xpad'...
remote: Counting objects: 7, done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 7 (delta 0), reused 5 (delta 0), pack-reused 0
Unpacking objects: 100% (7/7), done.
Checking connectivity... done.
patching file xpad.c
Hunk #2 succeeded at 1571 (offset 65 lines).
/home/pi

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Building 'xpad' : Updated Xpad Linux Kernel driver
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Creating symlink /var/lib/dkms/xpad/0.4/source ->
                 /usr/src/xpad-0.4

DKMS: add completed.

Kernel preparation unnecessary for this kernel.  Skipping...

Building module:
cleaning build area....
make KERNELRELEASE=4.4.38-v7+ KVERSION=4.4.38-v7+.....
cleaning build area....

DKMS: build completed.

xpad.ko:
Running module version sanity check.
 - Original module
   - Found /lib/modules/4.4.38-v7+/extra/xpad.ko
   - Storing in /var/lib/dkms/xpad/original_module/4.4.38-v7+/armv7l/
   - Archiving for uninstallation purposes
 - Installation
   - Installing to /lib/modules/4.4.38-v7+/extra/

depmod....

DKMS: install completed.
/opt/retropie/supplementary/xpad /home/pi

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Configuring 'xpad' : Updated Xpad Linux Kernel driver
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/home/pi