WARNING: Unattended installation should have a compilation policy. If any packages require unrecognized compilation steps, composer will prompt for approval. However, it is not possible to prompt during unattended installation. You should set a preference via environment-variable or composer configuration, e.g. - export COMPOSER_COMPILE=all - export COMPOSER_COMPILE=whitelist - export COMPOSER_COMPILE=none - composer config extra.compile-mode all - composer config extra.compile-mode whitelist - composer config extra.compile-mode none