anchor.diff:    inherit libc extraBuildCommands;
   };
   
  -wrapCC = wrapCCWith (callPackage ../build-support/cc-wrapper) pkgs.stdenv.cc.libc "";
  +wrapCC =
  +  wrapCCWith (callPackage ../build-support/cc-wrapper) pkgs.stdenv.cc.libc "";
   
   ################################################################################
   ################################################################################
  
positive.code: 
    fetchgitPrivate = callPackage ../build-support/fetchgit/private.nix { };
  
    fetchgitrevision = import ../build-support/fetchgitrevision runCommand pkgs.git;
  
    fetchgitLocal = callPackage ../build-support/fetchgitlocal { };
  
  
negative.code:   # ... pkgs.foo ...").
    pkgs = applyGlobalOverrides (config.packageOverrides or (pkgs: {}));
  
    mkOverrides = pkgsOrig: overrides:
      overrides // (
        lib.optionalAttrs (pkgsOrig.stdenv ? overrides)
            (pkgsOrig.stdenv.overrides pkgsOrig)
      );
  
    # Return the complete set of packages, after applying the overrides
    # returned by the `overrider' function (see above).  Warning: this
  