No Mink instance is defined in the Mink context class. Have you enabled the Mink extension? (RuntimeException)

I'm trying to use mink with Behat on Zend 1 platform, but when I run the Behat command, I get this error "Mink instance was not installed in the Mink context class. Have you enabled the Mink extension? (RuntimeException)"

here's my composer:

"behat/behat": "^3.0@dev",
"behat/mink": "1.5.*@stable",
"behat/mink-goutte-driver": "*",
"behat/mink-extension": "*"

      

        
        
        
      

    

& here's my behat.yml:

default:
    extensions:
        Behat\MinkExtension\Extension:
            base_url: http://en.wikipedia.org
            goutte: ~

      

        
        
        
      

    

& here's my feature:

Feature: Search
   In order to see a word definition
   As a website user
   I need to be able to search for a word

  Scenario: Searching for a page that does exist
    Given I am on "/wiki/Main_Page"
    When I fill in "search" with "Behavior Driven Development"
    And I press "searchButton"
    Then I should see "agile software development"

      

        
        
        
      

    

& my FeatureContext.php:

<?php

use Behat\Behat\Context\Context;
use Behat\Behat\Context\SnippetAcceptingContext;
use Behat\Gherkin\Node\PyStringNode;
use Behat\Gherkin\Node\TableNode;
use Behat\MinkExtension\Context\MinkContext;

class FeatureContext extends Behat\MinkExtension\Context\MinkContext
{
    public function __construct()
    {
    }
}