anchor.diff:  { stdenv
   , fetchurl
  +, lib
   
   , zlib
   
  
positive.code:     touch "$out"/nix-support/cc-wrapper-ignored
    '';
  
    meta = with stdenv.lib; {
      description = "Tools for manipulating binaries (linker, assembler, etc.)";
      homepage = http://www.gnu.org/software/binutils/;
      license = licenses.gpl3Plus;
  
negative.code: }:
  
  let
    inherit (lib)
      boolEn
      boolWt
      optional
  