starquake [1] filed a deletion request for pacdiffviewer [2]: Software looks abandoned.
Doesn't work because of an outdated libalpm library. Maintainer of the package is the same as upstream and a PR with a fix has not been merged for almost a year now: https://github.com/Morganamilo/pacdiffviewer/pull/3 [1] https://aur.archlinux.org/account/starquake/ [2] https://aur.archlinux.org/pkgbase/pacdiffviewer/
