This was a personal port with modifications made a while back, there is no reason for you to be building off of this. I am sorry for the confusion. Please see the up to date build here: https://gitlab.com/CDAGaming/fabritone/-/pipelines
Much to all of this project was made by those guys anyways, please use that :)
Fork of Baritone with support for Fabric.
Download the latest release and put the jar in .minecraft/mods/.
Compatible with Minecraft 1.15.X
NOTE the prefix for using baritone with this build is @ not #