Also, AUR packages can be installed
manually. For example, to install the package inxi, get a link of its tarball (
https://aur.archlinux.org/packages/inxi/ > Download snapshot > mouse right click > Copy Link Location) and run:
vn@ lx ~ % mkdir build
vn@ lx ~ % cd build
vn@ lx build % wget https://aur.archlinux.org/cgit/aur.git/snapshot/inxi.tar.gz
vn@ lx build % tar -xvzf inxi.tar.gz
vn@ lx build % cd inxi
vn@ lx inxi % makepkg -s
vn@ lx inxi % sudo pacman -U inxi-3.0.07-1-any.pkg.tar.xz