RoundcubeInstaller.php

<?php

namespace Composer\Installers;

class RoundcubeInstaller extends BaseInstaller {
    
    /** @var array<string, string> */
    protected $locations = array(
        'plugin' => 'plugins/{$name}/',
    );
    
    /**
     * Lowercase name and changes the name to a underscores
     */
    public function inflectPackageVars(array $vars) : array {
        $vars['name'] = strtolower(str_replace('-', '_', $vars['name']));
        return $vars;
    }

}