anchor.diff:    buildFlags = buildAndInstallFlags ++ [
       "shared_lib"
       "static_lib"
  -  ];
  +  ] ++ tools ;
   
     installFlags = buildAndInstallFlags ++ [
       "INSTALL_PATH=\${out}"
  
positive.code:     cat make_config.mk
      mkdir -pv $static/lib/
      mv -vi $out/lib/${LIBNAME}.a $static/lib/
    '';
  
    enableParallelBuilding = true;
  
negative.code: 
  let
    malloc = if jemalloc != null then jemalloc else gperftools;
    tools = [ "sst_dump" "ldb" "rocksdb_dump" "rocksdb_undump" "blob_dump" ];
  in
  stdenv.mkDerivation rec {
    name = "rocksdb-${version}";
    version = "5.10.3";
  
    outputs = [ "dev" "out" "static" "bin" ];
  
    src = fetchFromGitHub {
      owner = "facebook";
  