Laravel Deployer unknown error

namespace Deployer;

require 'recipe/laravel.php';
require 'contrib/php-fpm.php';
require 'contrib/npm.php';

set('repository', $repoUrl);

host('prod')
    ->set('remote_user', $linuxUser)
    ->set('hostname', $hostname)
    ->set('deploy_path', '/var/www/' . $projectName)
;

task('deploy', [
    'deploy:prepare',
    'deploy:vendors',
    'artisan:storage:link',
    'artisan:view:cache',
    'artisan:config:cache',
    'artisan:migrate',
    'npm:install',
    'build',
    'deploy:publish',
]);

task('build', function () {
    run('pwd');
});

after('deploy:failed', 'deploy:unlock');