- The patch 0001-KOverlayIconPlugin.patch should be applied to kde-baseapps git repository
(It should applies to frameworks branch)

- Recompile and install dolphin (frameworks branch)

- 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)