lib64z-dev software package provides virtual package provided by lib64z1-dev, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install lib64z-dev
lib64z-dev is installed in your system.
Make ensure the lib64z-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep lib64z-dev*
You will get with lib64z-dev package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Virtual packages |
| Package | lib64z-dev |
| Version | |
| Description | virtual package provided by lib64z1-dev |
| Sub Section | virtual |