cyrus-dev-2.4 software package provides Cyrus mail system - developer files, 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 cyrus-dev-2.4
cyrus-dev-2.4 is installed in your system.
Make ensure the cyrus-dev-2.4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep cyrus-dev-2.4 *
You will get with cyrus-dev-2.4 package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Development |
| Package | cyrus-dev-2.4 |
| Version | 2.4.16-4+deb7u2 |
| Description | Cyrus mail system - developer files |
| Sub Section | devel |