After a minimal install of Arch Linux, you can use this method to finalise your install.
Sorry, I've added pubs on the video but it's part of the paid of my work...
For the minimal install, see archfi
Projects :
archfi project : https://github.com/MatMoul/archfi
archdi project : https://github.com/MatMoul/archdi
archdi packages : https://github.com/MatMoul/archdi-pkg