anchor.diff:    pkgsFun = pkgs: overrides:
       let
         defaultScope = pkgs // pkgs.xorg;
  -      self = helperFunctions // self_ // overrides;
   
         # Helper functions that are exported through `pkgs'.
         helperFunctions =
  
positive.code:   else alias;
  
  in
    lib.mapAttrs tweakAlias aliases // self;
  
  in
    pkgs
  
negative.code:       stdenvAdapters =
          import ../stdenv/adapters.nix pkgs;
  
        self = with helperFunctions; with self; with overrides; {
  
    # Make some arguments passed to all-packages.nix available
    inherit system platform;
  