Laravel 5.6 - DB select Call to a member function join() on array

I have following query:

$clinics =  \DB::select('SELECT * FROM
(SELECT *,
 (100 * acos(cos(radians(' . $lat . ')) * cos(radians(lat)) *
 cos(radians(lng) - radians(' . $lng . ')) +
 sin(radians(' . $lat . ')) * sin(radians(lat))))
 AS distance
 FROM clinics) AS distances
 WHERE distance < 100
 ORDER BY distance')
 ->join('countries', 'clinics.country_id', '=', 'countries.id');

When I run it I am getting following error:

Symfony \ Component \ Debug \ Exception \ FatalThrowableError (E_ERROR)
Call to a member function join() on array

Is it possible to perform JOIN with this query? I tried adding JOIN in the select query, but I am getting an error:

Column not found: 1054 Unknown column 'clinics.country_id' in 'on clause' (SQL: SELECT * FROM (SELECT *, (100 * acos(cos(radians(43.1557012)) * cos(radians(lat)) * cos(radians(lng) - radians(22.5856811)) + sin(radians(43.1557012)) * sin(radians(lat)))) AS distance FROM clinics) AS distances JOIN countries ON countries.id = clinics.country_id WHERE distance < 100 ORDER BY distance)

The query in question:

$clinics =  \DB::select('SELECT * FROM
    (SELECT *,
     (100 * acos(cos(radians(' . $lat . ')) * cos(radians(lat)) *
     cos(radians(lng) - radians(' . $lng . ')) +
     sin(radians(' . $lat . ')) * sin(radians(lat))))
     AS distance
     FROM clinics) AS distances
     JOIN countries ON countries.id = clinics.country_id
     WHERE distance < 100
     ORDER BY distance');

via Chebli Mohamed