anchor.diff:  , lzo
   , util-linux_lib
   , zlib
  +, zstd
   }:
   
   let
  -  version = "4.13.3";
  +  version = "4.14";
   
     tarballUrls = [
       "mirror://kernel/linux/kernel/people/kdave/btrfs-progs/btrfs-progs-v${version}.tar"
  
positive.code:   src = fetchurl {
      urls = map (n: "${n}.xz") tarballUrls;
      hashOutput = false;
      sha256 = "805bdb0031c21a0a5d2ba295a8c9bdd8ba831a68c3fa801aab85677ec902d783";
    };
  
    nativeBuildInputs = [
  
negative.code:     lzo
      util-linux_lib
      zlib
      zstd
    ];
  
    passthru = {
  