MarsSeed [1] filed a deletion request for qt5-serialbus-git [2]: Not useful to keep this package. Qt5 is EOL since May 2023. This PKGBUILD currently builds from upstream's Qt5 branch, which is typically behind the source used by the stable PKGBUILD in extra repo. Qt devs delay pushing Qt5 patches to the public repo by one year, whereas the KDE project cherry-picks and backports most of the important commits accepted by Qt Group for Qt5 but not yet publicly pushed. Therefore the extra repo build is better for users and developers alike, because it is based on newer code which has less bugs. As a consequence of all this, the extra/qt5* packages are quite like git VCS packages. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/qt5-serialbus-git/