anchor.diff:      [{datadir, PgDataDir}|Config].
   
   get_version(Config) ->
  -    %% XXX: maybe use datadir/PG_VERSION after initdb?
  -    Utils = ?config(utils, Config),
  -    Postgres = ?config(postgres, Utils),
  -
  -    VersionStdout = list_to_binary(string:strip(os:cmd(Postgres ++ " -V"), both, $\n)),
  -    VersionBin = lists:last(binary:split(VersionStdout, <<" ">>, [global])),
  +    Datadir = ?config(datadir, Config),
  +    VersionFile = filename:join(Datadir, "PG_VERSION"),
  +    {ok, VersionFileData} = file:read_file(VersionFile),
  +    VersionBin = list_to_binary(string:strip(binary_to_list(VersionFileData), both, $\n)),
       Version = lists:map(fun erlang:binary_to_integer/1,
  -                        binary:split(VersionBin, <<".">>, [global])),
  +                         binary:split(VersionBin, <<".">>, [global])),
       [{version, Version} | Config].
   
   write_postgresql_config(Config) ->
  
positive.code:     ok = application:start(erlexec),
      pipe([
          fun find_utils/1,
          fun get_version/1,
          fun init_database/1,
          fun write_postgresql_config/1,
          fun copy_certs/1,
          fun write_pg_hba_config/1,
  
negative.code:         "host    epgsql_test_db1 epgsql_test_md5         127.0.0.1/32    md5\n",
          "host    epgsql_test_db1 epgsql_test_cleartext   127.0.0.1/32    password\n",
          "hostssl epgsql_test_db1 epgsql_test_cert        127.0.0.1/32    cert clientcert=1\n" |
          case Version >= [10] of
              true ->
                  %% See
                  %% https://www.postgresql.org/docs/10/static/release-10.html
  