Note that OTP>=19 required (if you want to upgrade it using release_handler).
Go to director and use rebar or rebar3.
Pouriya@Jahanbakhsh ~ $ cd director
rebar
Pouriya@Jahanbakhsh ~/director $ rebar compile ==> director_test (compile) Compiled src/director.erl Pouriya@Jahanbakhsh ~/director $
rebar3
Pouriya@Jahanbakhsh ~/director $ rebar3 compile ===> Verifying dependencies... ===> Compiling director Pouriya@Jahanbakhsh ~/director $