Vu dans le tab "Library Paths"
Library Paths
Use this tab to select additional directories where Qt should search for component plugins.
These directories should be the base directory of where your plugins are stored. For example, if you wish to store GUI Style plugins in $HOME/plugins/styles and Qt Designer plugins in $HOME/plugins/designer, you would add $HOME/plugins to your Library Path.
Notes:
The Qt Configuration program does not support environment variables, so you must give full path names, for example /home/brad/myplugins not $HOME/myplugins
Qt automatically searches in the directory where you installed Qt for component plugins. Removing that path is not possible.