Zenwalk uses the netpkg package management system. It is developed in-house, and it provides the main functionality of the apt-get variety of package managers. It uses Slackware's .tgz package format, but adds dependency resolution capabilities. The system uses meta files to provide dependency information, as well as package description during the install process. This convenience is only available to the official Zenwalk mirrors listed in the netpkg configuration file, "netpkg.conf". In addition to the original "netpkg" command line interface, "xnetpkg" provides a GUI frontend with similar capabilities.