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Arch Linux Now Believes Malware Incident Under Control: More Than 1,500 Affected Packages
(www.phoronix.com)
This is a most excellent place for technology news and articles.
Guix packages are vetted.
AUR packages aren't.
And, package definitions in Guix are not shell scripts but highly abstracted functional installers that use the respective build tools of software packages. This makes them much easier to review - and quicker to write, in many cases.
Guix is also fully reproducible.
As the case of the xz-utils package shows, this does not prevent that a widely used project is taken over by malicious actors, and stealthily malware becomes inserted. But the effort to do this is much larger, since this needs write access to the software's source code.
And no, I don't think Guix is the magical silver bullet for software security. But it is much better than unvetted shell scripts in AUR.