libavahi-qt4-1 software package provides Avahi Qt 4 integration library, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ 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
| Distro | Debian 7 wheezy |
| Section | Libraries |
| Package | libavahi-qt4-1 |
| Version | 0.6.31-2 |
| Description | Avahi Qt 4 integration library |
| Sub Section | libs |