зеркало из https://github.com/nextcloud/desktop.git
README
- Recompile and install recent enough version of dolphin and kio (git from oct 2015) - Build and install the plugin - Make sure to set XDG_DATA_DIRS=$PREFIX/share, QT_PLUGIN_PATH=$PREFIX/lib64/plugins/ - After installing, run kdeinit5 --noincremental - restart dolphin (make sure to kill all instances)