anchor.diff:      case os:type() of
           {unix, _} ->
               SourceStr = string:join(Sources, " "),
  -            {ok, []} = rebar_utils:sh(?FMT("cp -R ~s ~s", [SourceStr, Dest]),
  +            {ok, []} = rebar_utils:sh(?FMT("cp -R \"~s\" \"~s\"",
  +                                           [SourceStr, Dest]),
                                         [{use_stdout, false}, return_on_error]),
               ok;
           {win32, _} ->
  
positive.code: mv(Source, Dest) ->
      case os:type() of
          {unix, _} ->
              {ok, []} = rebar_utils:sh(?FMT("mv ~s ~s", [Source, Dest]),
                                        [{use_stdout, false}, return_on_error]),
              ok;
          {win32, _} ->
              {ok, R} = rebar_utils:sh(
                          ?FMT("cmd " "/c move /y ~s ~s 1> nul",
                               [filename:nativename(Source),
                                filename:nativename(Dest)]),
                          [{use_stdout, false}, return_on_error]),
  
negative.code: rm_rf(Target) ->
      case os:type() of
          {unix, _} ->
              EscTarget = re:replace(Target, " ", "\\\\ ",
                                     [global, {return, list}]),
              {ok, []} = rebar_utils:sh(?FMT("rm -rf ~s", [EscTarget]),
                                        [{use_stdout, false}, return_on_error]),
              ok;
          {win32, _} ->
  