Repository
nerdstuff.org provides some packages from the Arch Linux User Repository (AUR) for x86_64 and AArch64 systems in an own repository - see the content here.
To use the nerdstuff repository, add the following lines to your /etc/pacman.conf
file:
[nerdstuff]
Server = https://getpackages.org/repos/archlinux/$repo/$arch
Finally, import the required key by executing
pacman-key --recv-keys 223AAA374A1D59CE
pacman-key --finger 223AAA374A1D59CE
pacman-key --lsign-key 223AAA374A1D59CE
as root.