x.y.z or default (as originally proposed in https://mail.cs.uu.nl/pipermail/nix-dev/2009-September/002989.html). For instance, an expression like stdenv.lib.attrByPath ["features" "ckSched"] false args can now be written as args.features.ckSched or false
The Nix Emacs mode supports syntax highlighting, somewhat sensible indenting, and refilling of comments. To enable Nix mode in Emacs, add something like this to your ~/.emacs file: (load "/nix/share/emacs/site-lisp/nix-mode.el") This automatically causes Nix mode to be activated for all files with extension `.nix'.