anchor.diff:      zlib
       zstd
     ];
  -
  -  postPatch = ''
  -    grep -q 'attr/xattr.h' cmd_migrate.c
  -    sed -i 's,attr/xattr.h,sys/xattr.h,' cmd_migrate.c
  -  '';
   
     preBuild = ''
       makeFlagsArray+=(
  
positive.code:   src = fetchzip {
      version = 6;
      url = "https://evilpiepirate.org/git/bcachefs-tools.git/snapshot/bcachefs-tools-${rev}.tar.xz";
      multihash = "QmSBFrirXfgtSvpRiNTH3wrqVAMRESBZSmA7kVDtY4cG1S";
      sha256 = "49923eb0817cf3f8ea311680e77024882a508e77412708875d673aacfed7b9b5";
    };
  
    buildInputs = [
  
negative.code: }:
  
  let
    date = "2019-01-14";
    rev = "8630059e6ac363bea39e54df3f8115da5a5c2c5d";
  in
  stdenv.mkDerivation {
    name = "bcachefs-tools-${date}";
  