rebar3.crashdump

Error: undef
[{rebar_api,error,["Failed to retrieve package information"],[]},
 {rebar3_hex_info,do,1,
                  [{file,"/Users/wkenny/Development/want.erl/_build/default/plugins/rebar3_hex/src/rebar3_hex_info.erl"},
                   {line,42}]},
 {rebar_core,do,2,
             [{file,"/home/tristan/Devel/rebar3/_build/default/lib/rebar/src/rebar_core.erl"},
              {line,125}]},
 {rebar_prv_do,do_tasks,2,
               [{file,"/home/tristan/Devel/rebar3/_build/default/lib/rebar/src/rebar_prv_do.erl"},
                {line,68}]},
 {rebar_core,do,2,
             [{file,"/home/tristan/Devel/rebar3/_build/default/lib/rebar/src/rebar_core.erl"},
              {line,125}]},
 {rebar3,main,1,
         [{file,"/home/tristan/Devel/rebar3/_build/default/lib/rebar/src/rebar3.erl"},
          {line,56}]},
 {escript,run,2,[{file,"escript.erl"},{line,759}]},
 {escript,start,1,[{file,"escript.erl"},{line,277}]}]