debtree software package provides package dependency graphs on steroids, 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 debtree
debtree is installed in your system.
Make ensure the debtree package were installed using the commands given below,
$ sudo dpkg-query -l | grep debtree *
You will get with debtree package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Utilities |
| Package | debtree |
| Version | 1.0.10 |
| Description | package dependency graphs on steroids |
| Sub Section | Utils |