Arch Linux Live System Update?

Is there a way to update the live system of Arch Linux? The reason I am asking this is because I absolutely need the newest version of archinstall, which currently is 3.0.8 and the current Arch ISO archlinux-2025.06.01-x86_64.iso only has version 3.0.7. Executing pacman -Syu in order to update all sources results in errors "could not extract ...tar.gz (Write failed)" which I interpret as not being able to update the live system (educated guess). Now, the next Arch ISO will be the one for 1st of July, but me being impatient would like to just bring all the necessary packages up-to-date and then run archinstall. Why do I need the current archinstall in at least version 3.0.8? Due to an error with a VirtualBox VM + enabled 3D acceleration, and a missing file xf86-video-vmware, it is not possible to install Arch with archinstall. Apparently, this error has been resolved in version 3.0.8.