anchor.diff:      case needs_compile(Source, Target, Hrls) of
           true ->
               Opts = [{i, "include"}, {outdir, filename:dirname(Target)}, report, return] ++
  -                rebar_config:get(Config, erl_opts, []),
  +                ErlOpts,
               case compile:file(Source, Opts) of
                   {ok, _, []} ->
                       ok;
  
positive.code: 
              lists:foldl(F, 10, Trees)
      end.
  
negative.code:     CurrPath = code:get_path(),
      code:add_path("ebin"),
      rebar_base_compiler:run(Config, FirstErls, SortedRestErls,
                              fun(S, C) -> internal_erl_compile(S, C, OutDir,
                                                                ErlOpts)
                              end),
      code:set_path(CurrPath),
      ok.
  
  