https://aur.archlinux.org/packages/weka/ It should use the latest stable version 3.6.11, instead of current 3.7 branch. Current weka should be renamed to something like weka-devel. Although a previous maintainer states that " The difference between stable and development upstream is pointless, there is no reason not to be using this branch." , there still exist users who want to use a stable package. So a rename is necessary to clarify. And if possible, orphan it as well, several packages of the maintainer are out of date.