It would help if when you have problems you post the command issued and the full output, or at least more of it.
For the hell of it I just tried to build an iso
/artools-workspace 00:00:10
❯ buildiso -p lxqt
==> Start building [lxqt]
-> Deleting chroot copy 'rootfs'...
==> Deleting isoroot [iso] ...
-> Loading Packages: [Packages-base] ...
-> Loading Packages: [Packages-apps] ...
-> Loading Packages: [Packages-openrc] ...
-> Loading Packages: [Packages-xorg] ...
-> Loading Packages: [Packages-Root] ...
==> Prepare [Base installation] (rootfs)
==> Creating install root at /var/lib/artools/buildiso/lxqt/artix/rootfs
-> Installing packages to /var/lib/artools/buildiso/lxqt/artix/rootfs
:: Synchronizing package databases...
system downloading...
world downloading...
galaxy downloading...
error: target not found: ipw2100-fw
error: target not found: ipw2200-fw
==> ERROR: Failed to install packages to new root
==> ERROR: A failure occurred in make_rootfs().
Aborting...
Is that what you got ?
I searched within ~/artools-workspace for ipw2100-fw
It's in ~/artools-workspace/iso-profiles/common/Packages-base
So I commented the the two relevant lines
iptables
#ipw2100-fw
#ipw2200-fw
jfsutils
as those packages do not exist in the Artix repos
❯ pacman -Si ipw2100-fw
error: package 'ipw2100-fw' was not found
~/Files 00:05:44
❯ pacman -Si ipw2200-fw
error: package 'ipw2200-fw' was not found
After this change the iso was built successfully after I issued the command again.
If haven't tested the actual iso's
Also the wiki page mentions That's wrong it seems. I have live-overlay and root-overlay. I guess substitute desktop-overlay with root-overlay while following the instructions ?