Hop uses Nixpacks for automatic, configless deployments. You can write a custom Dockerfile if you don't want to use Nixpacks.

Elixir applications are detected when you have a mix.exs file in your project root. Dependencies are installed with mix deps.get and the application is built with mix compile.


Thanks to a community member, you can use libcluster directly with Hop to automatically cluster your Elixir applications. You can find the libcluster_hop strategy here.


By default, the Elixir version for your project is inferred from the elixir version in your mix.exs file.

The following Elixir versions are available:

  • latest (default)
  • 1.12
  • 1.11
  • 1.10
  • 1.9

If you need to support a version that isn’t listed above, you should write a custom Dockerfile.

Overriding the version

The version can be overridden by:

  • Setting the ELIXIR_VERSION environment variable