anchor.diff:      sphinx guzzle_sphinx_theme
     ];
     buildInputs = [
  -    libb2 lz4 openssl python3Packages.setuptools_scm
  +    libb2 lz4 zstd openssl python3Packages.setuptools_scm
     ] ++ stdenv.lib.optionals stdenv.isLinux [ acl ];
     propagatedBuildInputs = with python3Packages; [
       cython msgpack-python
  
positive.code: { stdenv, python3Packages, acl, libb2, lz4, openssl, openssh }:
  
  python3Packages.buildPythonApplication rec {
    pname = "borgbackup";
  
negative.code:     export BORG_OPENSSL_PREFIX="${openssl.dev}"
      export BORG_LZ4_PREFIX="${lz4.dev}"
      export BORG_LIBB2_PREFIX="${libb2}"
      export BORG_LIBZSTD_PREFIX="${zstd}"
    '';
  
    makeWrapperArgs = [
  