In addition to numerous new and upgraded packages, this release has the following highlights: The following new services were added since the last release: When upgrading from a previous release, please be aware of the following incompatible changes: Other notable improvements: Modules can now be disabled by using disabledModules, allowing another to take it's place. This can be used to import a set of modules from another channel while keeping the rest of the system on a stable release. Updated to FreeType 2.7.1, including a new TrueType engine. The new engine replaces the Infinality engine which was the default in NixOS. The default font rendering settings are now provided by fontconfig-penultimate, replacing fontconfig-ultimate; the new defaults are less invasive and provide rendering that is more consistent with other systems and hopefully with each font designer's intent. Some system-wide configuration has been removed from the Fontconfig NixOS module where user Fontconfig settings are available.