Well, after some poking I finally got it working, I’m going to post it if it helps anybody, after running install.sh, I had to search for a systemd deamon that was available in the AUR, this one, and pasted it into /etc/systemd/system/, and finally ran:
systemctl start logmein-hamachi.service
sudo systemctl enable logmein-hamachi
And afterwards I just installed Haguichi, thanks for the help.