anchor.diff:  aliases = import ./aliases.nix self;
   
   in
  -  helperFunctions // stdenvDefault // self // aliases // overrides;
  +  helperFunctions // stdenvDefault // self // aliases;
   
   in
     pkgs
  
positive.code:       (pkgs.stdenv.overrides pkgs);
  
    # The un-overriden packages, passed to `overrider'.
    pkgsInit = pkgsFun pkgs {};
  
    # Return the complete set of packages, after applying the overrides
    # returned by the `overrider' function (see above).  Warning: this
  
negative.code:       overrides = overrider pkgs pkgsOrig // stdenvOverrides pkgsOrig;
  
        # The overriden, final packages.
        pkgs = pkgsFun pkgs // overrides;
      in pkgs;
  
    # The package compositions.  Yes, this isn't properly indented.
    pkgsFun = pkgs:
      let
        defaultScope = pkgs // pkgs.xorg;
  
  