anchor.diff:        pkgs.sysklogd
         pkgs.sysvinit
   #      pkgs.vim
  +      nix
         nixosInstaller
       ];
   
  
positive.code:   # The installer.
    nixosInstaller = import ./installer.nix {
      inherit (pkgs) stdenv genericSubstituter;
      nix = pkgs.nixUnstable; # needs the exportReferencesGraph feature
      shell = pkgs.bash + "/bin/sh";
    };
  
  
negative.code:     system = pkgs.stdenv.system;
      allPackages = import ./pkgs/top-level/all-packages.nix;
    };
  
    nix = pkgs.nixUnstable; # we need the exportReferencesGraph feature
  
  
    # Determine the set of modules that we need to mount the root FS.
  