anchor.diff: -{ lib, stdenv, fetchFromGitHub, perl }:
  +{ lib, stdenv, fetchFromGitHub, perl, buildPackages }:
   
   stdenv.mkDerivation rec {
     pname = "libstemmer";
  
positive.code: 
    prePatch = ''
      patchShebangs .
    '';
  
    makeTarget = "libstemmer.a";
  
negative.code:     runHook preInstall
      install -Dt $out/lib libstemmer.a
      install -Dt $out/include include/libstemmer.h
      install -Dt $out/bin {snowball,stemwords}
      runHook postInstall
    '';
  
  