nixos/pkgsets/emacs/nix-mode.nix

{ config, lib, ... }:

with lib;

mkIf (elem "emacs::nix-mode" config.machine.pkgs) {
  programs.emacs.init.usePackage.nix-mode = {
    enable = true;
    mode = [ ''"\\.nix\\'"'' ];
    config = ''(setq nix-nixfmt-bin "nixfmt -w 150")'';
  };
}