CONFIG0 = case os:getenv("REBAR_GIT_CLONE_OPTIONS") of
              "--depth 1" ->
                  CONFIG;
              _ ->
                  os:putenv("REBAR_GIT_CLONE_OPTIONS", "--depth 1"),
                  CONFIG
          end,

CONFIG1 = case os:getenv("TRAVIS") of
              "true" ->
                  JobId = os:getenv("TRAVIS_JOB_ID"),
                  [{coveralls_service_job_id, JobId},
                   {coveralls_coverdata, "_build/test/cover/*.coverdata"},
                   {coveralls_service_name , "travis-ci"} | CONFIG];
              _ ->
                  CONFIG
          end,

{_, Deps} = lists:keyfind(deps, 1, CONFIG1),
{_, OurDeps} = lists:keyfind(github_emqx_deps, 1, CONFIG1),
UrlPrefix = "https://github.com/emqx/",
NewDeps = Deps ++ [{Name, {git, UrlPrefix ++ atom_to_list(Name), {branch, Branch}}} || {Name, Branch} <- OurDeps],
CONFIG2 = lists:keystore(deps, 1, CONFIG1, {deps, NewDeps}),

CONFIG2.