case os:getenv("REBAR") of
    Missing when Missing =:= false; Missing =:= [] ->
        %% we are not building covertool directly, so do *not* fetch rebar
        {value, {deps, DepList}, RestConfig} = lists:keytake( deps, 1, CONFIG ),
        NewDepList = lists:keydelete( rebar, 1, DepList ),
        [{deps, NewDepList} | RestConfig];
    _RebarCmd -> CONFIG
end.