anchor.diff:                      digraph:del_vertex(G, Source),
                       modified;
                   LastModified when LastUpdated < LastModified ->
  -                    modify_erlcinfo(G, Source, Dirs);
  +                    modify_erlcinfo(G, Source, LastModified, Dirs);
                   _ ->
                       unmodified
               end;
           false ->
  -            modify_erlcinfo(G, Source, Dirs)
  -    end.
  -
  -modify_erlcinfo(G, Source, Dirs) ->
  +            modify_erlcinfo(G, Source, filelib:last_modified(Source), Dirs)
  +    end.
  +
  +modify_erlcinfo(G, Source, LastModified, Dirs) ->
       {ok, Fd} = file:open(Source, [read]),
       Incls = parse_attrs(Fd, []),
       AbsIncls = expand_file_names(Incls, Dirs),
       ok = file:close(Fd),
  -    LastUpdated = {date(), time()},
  -    digraph:add_vertex(G, Source, LastUpdated),
  +    digraph:add_vertex(G, Source, LastModified),
       digraph:del_edges(G, digraph:out_edges(G, Source)),
       lists:foreach(
         fun(Incl) ->
  
positive.code:     end.
  
  store_erlcinfo(G, InclDirs) ->
      Vs = lists:map(
             fun(V) ->
                     digraph:vertex(G, V)
             end, digraph:vertices(G)),
      Es = lists:flatmap(
             fun({V, _}) ->
                     lists:map(
                       fun(E) ->
                               {_, V1, V2, _} = digraph:edge(G, E),
                               {V1, V2}
                       end, digraph:out_edges(G, V))
             end, Vs),
      File = erlcinfo_file(),
      ok = filelib:ensure_dir(File),
      Data = term_to_binary(#erlcinfo{info={Vs, Es, InclDirs}}, [{compressed, 9}]),
  
negative.code: erlcinfo_file() ->
      filename:join([rebar_utils:get_cwd(), ".rebar", ?ERLCINFO_FILE]).
  
  %% Get dependency graph of given Erls files and their dependencies (header files,
  %% parse transforms, behaviours etc.) located in their directories or given
  %% InclDirs.  Note that last modification times stored in vertices are only for
  %% internal optimization and cannot be directly used for deciding whether to
  %% recompile a file, since when the file itself doesn't change we don't check its
  %% dependencies which might change.
  init_erlcinfo(InclDirs, Erls) ->
      G = digraph:new(),
      try restore_erlcinfo(G, InclDirs)
  