# `mix rustler_precompiled.download`
[🔗](https://github.com/philss/rustler_precompiled/blob/v0.9.0/lib/mix/tasks/rustler_precompiled.download.ex#L1)

A task responsible for downloading the precompiled NIFs for a given module.

This task must only be used by package creators who want to ship the
precompiled NIFs. The goal is to download the precompiled packages and
generate a checksum to check-in alongside the project in the the Hex repository.
This is done by passing the `--all` flag.

You can also use the `--only-local` flag to download only the precompiled
package for use during development.

You can use the `--ignore-unavailable` flag to ignore any NIFs that are not available.
This is useful when you are developing a new NIF that does not support all platforms.

This task also accept the `--print` flag to print the checksums.

Since v0.7.2 we configure the app invoking this mix task by default. This means that
the app you are invoking this task from will be compiled and run the "release" configuration.
We need to compile the app to make sure the module name is correct.
To avoid that, use the `--no-config` flag.

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*Consult [api-reference.md](api-reference.md) for complete listing*