Minor fix at postinstall
Minor fix at postinstall

yunohost-bot/yunohost-admin,N4rius/yunohost-admin,yunohost-bot/yunohost-admin,N4rius/yunohost-admin,N4rius/yunohost-admin,YunoHost/yunohost-admin,yunohost-bot/yunohost-admin,YunoHost/yunohost-admin,N4rius/yunohost-admin