In addition to numerous new and upgraded packages, this release has the following highlights: Following new services were added since the last release: brltty marathon When upgrading from a previous release, please be aware of the following incompatible changes: Steam now doesn't need root rights to work. Instead of using *-steam-chrootenv, you should now just run steam. steamChrootEnv package was renamed to steam, and old steam package -- to steamOriginal. CMPlayer has been renamed to bomi upstream. Package cmplayer was accordingly renamed to bomi The default NIX_PATH for NixOS now includes /nix/var/nix/profiles/per-user/root/channels, so it's easy to add custom channels. Moreover, whenever a nixos-rebuild <action> --upgrade is issued, every channel that includes a file called .update-on-nixos-rebuild will be upgraded alongside of the nixos channel. The CUPS printing service has been updated to version 2.0.2. Furthermore its systemd service has been renamed to cups.service. Local printers are no longer shared or advertised by default. This behavior can be changed by enabling services.printing.defaultShared or services.printing.browsing respectively. HPLIP (printer, scanner, and fax drivers for HP devices) has been updated to version 3.15.4. This release adds support for the arm6l-linux and arm7l-linux platforms.