# Packages {#chap-packages} This chapter contains information about how to use and maintain the Nix expressions for a number of specific packages, such as the Linux kernel or X.org. ```{=include=} sections citrix.section.md darwin-builder.section.md dlib.section.md eclipse.section.md elm.section.md emacs.section.md firefox.section.md fish.section.md fuse.section.md ibus.section.md kakoune.section.md krita.section.md linux.section.md locales.section.md etc-files.section.md nginx.section.md opengl.section.md shell-helpers.section.md steam.section.md cataclysm-dda.section.md urxvt.section.md vcpkg.section.md weechat.section.md xorg.section.md ```