anchor.diff:  , which, zlib }:
   
   let
  -  version = "4.2.1";
  +  version = "4.2.4";
   
   in stdenv.mkDerivation rec {
     name = "tvheadend-${version}";
  
positive.code:     owner  = "tvheadend";
      repo   = "tvheadend";
      rev    = "v${version}";
      sha256 = "1lhk8psvifmn4kjwyfxjj21z0apyr59zizzsfd4j22v7bk66rrl9";
    };
  
    buildInputs = [
  
negative.code:   preConfigure = ''
      patchShebangs ./configure
  
      substituteInPlace src/config.c \
        --replace /usr/bin/tar ${gnutar}/bin/tar
  
      # the version detection script `support/version` reads this file if it
      # exists, so let's just use that
  