rebar3_hex should not be included as a plugin in rebar.config. See documenation:
NOTE : Be sure not to add rebar3_hex to the plugins section within a projects rebar3 config as this will become a dependency for others downloading your package from hex.pm
rebar3_hex should not be included as a plugin in rebar.config. See documenation:
Perhaps it should be in
project_plugins
instead.