anchor.diff:        chmod -R u+w rethinkdb
         cd rethinkdb
         echo "${version}" > VERSION.OVERRIDE
  -      cp -rv --no-preserve=all $fetchDependencies/* .
  +      cp -r --no-preserve=all $fetchDependencies/* .
         ${patchScripts}
         ./configure --fetch jemalloc
         ${make} dist-dir DIST_DIR=$out
  
positive.code:       curl
      ];
      builder = mkBuilder ''
        cp -rv --no-preserve=all $src/* .
        ./configure
        ${make} DEBUG=1
        test/run -j $NIX_BUILD_CORES '!long' ${skip_tests_filter} || :
  
negative.code: with rec {
    inherit (builtins)
      toFile readFile concatStringsSep unsafeDiscardStringContext
      listToAttrs match head tail toJSON toPath elemAt getAttr length
      trace genList isString fromJSON getEnv concatLists toString;
    foldl = builtins.foldl'; #'
    tracing = x: trace x x;
    for = xs: f: map f xs;
    pkgs = import <nixpkgs> {};
  };
  let
    mkBuilder = script: toFile "builder.sh" ("source $stdenv/setup\n" + script);
  
    scripts = concatStringsSep " " [
  