anchor.diff:  
       timer:send_after(?ARTIFACT_INTERVAL, ?ARTIFACT_MESSAGE),
       {noreply, State};
  -handle_info(?BUILD_GRAPH_MESSAGE, #state{running_nodes=Nodes}=State) ->
  +handle_info(?BUILD_GRAPH_MESSAGE, State) ->
  +    %% Get all running nodes, because we need the list of *everything*
  +    %% to analyze the graph for connectedness.
  +    Nodes = sets:union(clients_from_marathon(), servers_from_marathon()),
  +
       %% Build the graph.
       Graph = digraph:new(),
   
  
positive.code:     EvalIdentifier = lasp_config:get(evaluation_identifier, undefined),
      EvalTimestamp = lasp_config:get(evaluation_timestamp, 0),
      atom_to_list(Simulation) ++ "-" ++ atom_to_list(EvalIdentifier) ++ "-" ++ integer_to_list(EvalTimestamp).
  
negative.code: -define(ARTIFACT_MESSAGE,  artifact).
  
  %% State record.
  -record(state, {attempted_nodes, graph}).
  
  %%%===================================================================
  %%% API
  