anchor.diff:  
         extraNativeBuildInputs = [ prevStage.patchelf prevStage.paxctl ] ++
           # Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
  -        lib.optional localSystem.isAarch64 prevStage.updateAutotoolsGnuConfigScriptsHook;
  +        lib.optional (!localSystem.isx86) prevStage.updateAutotoolsGnuConfigScriptsHook;
   
         cc = prevStage.gcc;
   
  
positive.code:     };
      extraNativeBuildInputs = [ prevStage.patchelf prevStage.paxctl ] ++
        # Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
        lib.optional localSystem.isAarch64 prevStage.updateAutotoolsGnuConfigScriptsHook;
    })
  
  
  
negative.code:     };
      extraNativeBuildInputs = [ prevStage.patchelf prevStage.xz ] ++
        # Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
        lib.optional (!localSystem.isx86) prevStage.updateAutotoolsGnuConfigScriptsHook;
    })
  
    # Construct the final stdenv.  It uses the Glibc and GCC, and adds
  