Pessoal olha o que acontece quando executo o comando para instalar uma dependência no Ubuntu:
$ composer require php-http/promise
Cannot create cache directory /home/cleyton/.composer/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache
Cannot create cache directory /home/cleyton/.composer/cache/files/, or directory is not writable. Proceeding without cache
O que devo fazer neste caso?