The version of libqaccessibilityclient (0.1.1) available in Debian is a qt4 based one. I don't think that kmag can use it as is. There is a qt5 version of libqaccessibilityclient (0.2) but it's only available as an unstable release (https://download.kde.org/unstable/libqaccessibilityclient/) and we tend to avoid those (specially for libraries). I was considering requesting the removal of libqaccessibilityclient, as it doesn't have any reverse dependencies, and it's qt4 based, till I found this commit. Are you planning to upload libqaccessibilityclient 0.2?