Error installing Unity for Arch

[a-y-u-s-h]

Hello, I did : ./build-and-install.sh, it ran for a while and then somewhere in the middle it gave me this error :

/home/a-y-u-s-h/Unity-for-Arch/systemd/PKGBUILD: line 47: ./autogen.sh: No such file or directory
==> ERROR: A failure occurred in prepare().
    Aborting...
==> Making package: dbus-activation-env 1.10.10-1 (Mon Feb 12 08:52:06 IST 2018)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...

after this it continued doing other stuff for dbus-activation-env. I'm not sure if it'll install unity correctly, because I did this once before and it gave too many errors of the same kind later. Just to confirm. Is this going okay?