When I try to compile Elixir I get 'Uncaught error in rebar_core'

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$ make clean test

cd lib/elixir && "/home/maqbool/openSource/elixir/rebar" clean
Uncaught error in rebar_core: {error,
                              {erl_interface,include,
                                  "code:lib_dir(erl_interface)is unable to find the erl_interface library."}}
Makefile:118: recipe for target 'clean' failed
make: *** [clean] Error 1