If you’re running the command line installer, it will need to be done a bit differently on the AppleTV. You’ll need to reference the path to the proper frameworks. Below is the prefix you can use for the installer app.
Although I got the install to complete with no errors, Apple TV is still not recognizing the ethernet adapter in the USB port. Do I need to add something else to enable this port, or are the required networking extensions simply disabled from the USB port? Here’s the command line I used and results.
=== verbose output from command above ===
installer: Package name is AX88772 USB CDC Drivers
installer: Installing onto volume mounted at /.
installer: Preparing for installation…
installer: Preparing the Disk…
installer: Preparing Target Volume
installer: Preparing AX88772 USB CDC Drivers…
installer: Installing AX88772 USB CDC Drivers…
installer:
installer: Configuring Installation
installer: Writing files
It's likely this type of device may not be supported on the AppleTV. A number of frameworks that are present on a normal Mac, are not present on the AppleTV.