anchor.diff:  
     prePatch = ''
       patchShebangs .
  +  '' + lib.optionalString (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
  +    substituteInPlace GNUmakefile \
  +      --replace './snowball' '${lib.getBin buildPackages.libstemmer}/bin/snowball'
     '';
   
     makeTarget = "libstemmer.a";
  
positive.code:     runHook preInstall
      install -Dt $out/lib libstemmer.a
      install -Dt $out/include include/libstemmer.h
      runHook postInstall
    '';
  
  
negative.code: { lib, stdenv, fetchFromGitHub, perl, buildPackages }:
  
  stdenv.mkDerivation rec {
    pname = "libstemmer";
  