all the supporting system libraries and programs required by the program. Since no official lists of dependencies for stock packages are provided, if users decide to install a custom installation or install 3rd-party software, they will need to work through any possible missing dependencies themselves. Since the package manager doesn't manage dependencies, it will install any and all packages, whether or not dependencies are met. A user may find out that dependencies are missing only when attempting to use the software. While Slackware itself does not incorporate official tools to resolve dependencies, some unofficial, community-supported software tools do provide this function, similar to the way APT does for Debian-based distributions and yum does for Red Hat-based distributions. They include slapt-get is a command line utility that functions in a similar way to APT. While slapt-get does provide a framework for dependency resolution, it does not provide dependency resolution for packages included within the Slackware distribution. However, several community package sources and Slackware based distributions take advantage of this functionality. Gslapt is a graphical interface to slapt-get. Swaret is a package management tool featuring dependency resolution. It was originally included in Slackware version 9.1 as an optional package, but did not contain dependency resolution at that time. It was removed from the distribution with Slackware 10.0 and turned over to the community. It eventually added dependency resolution and roll-back functionality; however, as of May 2014, there are no active developers. NetBSD's pkgsrc provides support for Slackware, among other Unix-like operating systems. pkgsrc provides dependency resolution for both binary and source packages. Repositories There are no official repositories for Slackware. The only official packages Slackware provides are available on the installation media. However, there are many third-party repositories for Slackware; some are standalone repositories and others are for distributions that are Slackware-based but retain package compatibility with Slackware. Many of these can be searched at once using pkgs.org, which is a Linux package search engine. However, mixing and matching dependencies from multiple repositories can lead to two or more packages that require different versions of the same dependency, which is a form of dependency hell. Slackware itself won't provide any dependency resolution for these packages, however some projects will provide a list of dependencies that are not included with Slackware with the files for the package, commonly with a extension. Due to the possibility of dependency issues, many users choose to compile