Your requirements could not be resolved to an installable set of packages. Problem 1 - php-amqplib/php-amqplib[v3.2.0, ..., v3.6.2] require ext-sockets * -> it is missing from your system. Install or enable PHP's sockets extension. - enqueue/amqp-lib 0.10.19 requires php-amqplib/php-amqplib ^3.2 -> satisfiable by php-amqplib/php-amqplib[v3.2.0, ..., v3.6.2]. - Root composer.json requires enqueue/amqp-lib ^0.10.19 -> satisfiable by enqueue/amqp-lib[0.10.19]. To enable extensions, verify that they are enabled in your .ini files: - /usr/local/etc/php/conf.d/docker-php-ext-ast.ini - /usr/local/etc/php/conf.d/docker-php-ext-bcmath.ini - /usr/local/etc/php/conf.d/docker-php-ext-bz2.ini - /usr/local/etc/php/conf.d/docker-php-ext-intl.ini - /usr/local/etc/php/conf.d/docker-php-ext-pcntl.ini - /usr/local/etc/php/conf.d/docker-php-ext-pcov.ini - /usr/local/etc/php/conf.d/docker-php-ext-sodium.ini - /usr/local/etc/php/conf.d/docker-php-ext-zip.ini - /usr/local/etc/php/conf.d/opcache.ini - /usr/local/etc/php/conf.d/phpqa.ini You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode. Alternatively, you can run Composer with `--ignore-platform-req=ext-sockets` to temporarily ignore these required extensions.