anchor.diff:  , buildPackages }:
   
   let
  -  version = "5.8.1";
  +  version = "5.9";
   in
   
   stdenv.mkDerivation {
  
positive.code: 
    src = fetchurl {
      url = "mirror://sourceforge/zsh/zsh-${version}.tar.xz";
      sha256 = "sha256-tpc1ILrOYAtHeSACabHl155fUFrElSBYwRrVu/DdmRk=";
    };
  
    patches = [
  
negative.code:     '';
      license = "MIT-like";
      homepage = "https://www.zsh.org/";
      maintainers = with lib.maintainers; [ pSub artturin ];
      platforms = lib.platforms.unix;
    };
  
  