$ sudo apt-get update
$ sudo apt-get install libavahi-qt4-1 

libavahi-qt4-1 is installed in your system.

Make ensure the libavahi-qt4-1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libavahi-qt4-1 *

You will get with libavahi-qt4-1 package name, version, architecture and description in a table

libavahi-qt4-1 package basic information: