there is no source for this, so you will have to look in releases.
the files in the rewrite mod were not fully compatable with linux Psych Engine. this was because of capitalisation in the files (Linux is very case sensitive)
the repo that made this possible was: https://github.com/Munoida/FNF-PsychEngine-Linux-Releases i cant compile anything for the life of me.
For Debian based distros you will need to run:
sudo apt-get install luajit
You will prob need luajit on other distros but i know nothing about them so i cant rly help there.