If you use Docker, change the deployment to “nixpacks.toml.”

Mine ended up looking like this:

[phases.setup]

nixPkgs = [“php82”, “php82Packages.composer”, “php82Extensions.gd”, “php82Extensions.pdo_mysql”, “php82Extensions.zip”, “imagemagick”, ‘nginx’, “bash”]

[phases.build]

cmds = [“composer install --no-dev --optimize-autoloader”]

[start]

cmd = “php -S 0.0.0.0:$PORT”

About the error:

AH00534: apache2: Configuration error: More than one MPM loaded.

This message is not specific to Railway; it is an Apache configuration error that occurs when multiple MPMs (Multi-Processing Modules) are loaded simultaneously:

Apache can only have a single MPM enabled—e.g., prefork, worker, or event.

If two or more MPM modules are enabled in your configuration, Apache fails with that message.

Launchpad

Common causes in a Railway/container environment:

Your Dockerfile or base image already enables multiple MPMs

Some builds or stack templates have modules that are loaded by default.

You are manually including configurations that load duplicate MPMs

If you added custom configurations to Apache (e.g., in /etc/apache2/mods-enabled/), they are likely to duplicate the modules.

Heya, we're seeing a temporary spike in build times that is now over, please let us know if you run into this again.