Does not work (osx):

  ~/tmp/elixir-weather $ ./weather  Amsterdam

  =INFO REPORT==== 7-May-2015::16:37:56 ===
      application: elixir
      exited: {bad_return,
                  {{elixir,start,[normal,[]]},
                   {'EXIT',
                       {{badmatch,{error,enotsup}},
                        [{elixir,start,2,[{file,"src/elixir.erl"},{line,34}]},
                         {application_master,start_it_old,4,
                             [{file,"application_master.erl"},{line,272}]}]}}}}
      type: temporary
  Failed to start Elixir.
  error: {error,
             {elixir,
                 {bad_return,
                     {{elixir,start,[normal,[]]},
                      {'EXIT',
                          {{badmatch,{error,enotsup}},
                           [{elixir,start,2,[{file,"src/elixir.erl"},{line,34}]},
                            {application_master,start_it_old,4,
                                [{file,"application_master.erl"},
                                 {line,272}]}]}}}}}}