Double quotes

src/freedombone-image-mesh

     echo 'Comment[ru]=Выберите протокол маршрутизации сетки' >> /home/$MY_USERNAME/Desktop/routing.desktop
     echo 'Comment[zh]=选择网状路由协议' >> /home/$MY_USERNAME/Desktop/routing.desktop
     echo "Exec=mate-terminal -e \"/usr/local/bin/${PROJECT_NAME}-mesh-routing\"" >> /home/$MY_USERNAME/Desktop/routing.desktop
-    echo 'Icon=/usr/share/$PROJECT_NAME/avatars/icon_routing.png' >> /home/$MY_USERNAME/Desktop/routing.desktop
+    echo "Icon=/usr/share/${PROJECT_NAME}/avatars/icon_routing.png" >> /home/$MY_USERNAME/Desktop/routing.desktop
     echo 'Terminal=false' >> /home/$MY_USERNAME/Desktop/routing.desktop
     echo 'Categories=Application' >> /home/$MY_USERNAME/Desktop/routing.desktop