This happens because nextcloud-desktop uses private headers from QtGui. From https://build.opensuse.org/package/view_file/network/nextcloud-desktop/nextcloud-desktop.spec?expand=1: `BuildRequires: libQt5Gui-private-headers-devel` There's not much that can be done, except branching this package in KDE:Extra and building it for the 'KDE_Applications_openSUSE_Leap_15.3' and 'KDE_Applications_openSUSE_Leap_15.2'. I'll do that now