anchor.diff:      CodePathString = string:join(CodeDirs, " "),
       Cmd = case get_ct_specs(Cwd) of
                 undefined ->
  -                  ?FMT("erl " % should we expand ERL_PATH?
  -                       " -noshell -pa ~s ~s"
  +                  ?FMT("~s"
  +                       " -pa ~s"
  +                       " ~s"
                          " ~s"
                          " -logdir \"~s\""
                          " -env TEST_DIR \"~s\""
  -                       " ~s"
  -                       " -s ct_run script_start -s erlang halt",
  -                       [CodePathString,
  +                       " ~s",
  +                       [BaseCmd,
  +                        CodePathString,
                           Include,
                           build_name(Config),
                           LogDir,
  
positive.code:                       get_suites(Config, TestDir) ++
                        get_case(Config);
                SpecFlags ->
                    ?FMT("erl " % should we expand ERL_PATH?
                         " -noshell -pa ~s ~s"
                         " ~s"
                         " -logdir \"~s\""
                         " -env TEST_DIR \"~s\""
                         " ~s"
                         " -s ct_run script_start -s erlang halt",
                         [CodePathString,
                          Include,
                          build_name(Config),
                          LogDir,
  
negative.code:                       ""
                end,
  
      %% Check for the availability of ct_run; if we can't find it, generate a
      %% warning and use the old school, less reliable approach to running CT.
      BaseCmd = case os:find_executable("ct_run") of
                    false ->
                        "erl -noshell -s ct_run script_start -s erlang halt";
                    _ ->
                        "ct_run"
                end,
  
      %% Add the code path of the rebar process to the code path. This
      %% includes the dependencies in the code path. The directories
      %% that are part of the root Erlang install are filtered out to
  