anchor.diff:  }:
   
   stdenv.mkDerivation rec {
  -  name = "libtool-2.4.6";
  +  pname = "libtool";
  +  version = "2.4.6";
   
     src = fetchurl {
  -    url = "mirror://gnu/libtool/${name}.tar.gz";
  +    url = "mirror://gnu/libtool/${pname}-${version}.tar.gz";
       sha256 = "1qq61k6lp1fp75xs398yzi6wvbx232l7xbyn3p13cnh27mflvgg3";
     };
   
  
positive.code:       your Makefile, Makefile.in, or Makefile.am.  See the
        documentation for details.
      '';
  
      homepage = https://www.gnu.org/software/libtool/;
  
      license = stdenv.lib.licenses.gpl2Plus;
  
      maintainers = [ ];
      platforms = stdenv.lib.platforms.unix;
    };
  }
  
negative.code:   doCheck = false;
    doInstallCheck = false;
  
    enableParallelBuilding = true;
  
    # Don't run the native `strip' when cross-compiling.  This breaks at least
    # with `.a' files for MinGW.
    dontStrip = stdenv.hostPlatform != stdenv.buildPlatform;
  
    meta = with stdenv.lib; {
      description = "GNU Libtool, a generic library support script";
      longDescription = ''
        GNU libtool is a generic library support script.  Libtool hides
        the complexity of using shared libraries behind a consistent,
  