# `mix precompiled.deps`
[🔗](https://github.com/TomHoenderdos/elixir_precompiled/blob/v0.2.1/lib/mix/tasks/precompiled.deps.ex#L5)

Installs signed precompiled builds of the dependencies Mix is about to
compile, and rechecks the ones installed earlier. Not meant to be run by
hand: add it to the project's `deps.loadpaths` alias, which every
`mix compile`, `test`, `run` and `release` passes through before Mix
compiles the dependencies:

    def project do
      [
        ...,
        aliases: [
          "deps.loadpaths": ["deps.compile precompiled", "precompiled.deps", "deps.loadpaths"]
        ]
      ]
    end

The first entry compiles this library so the task exists; without it
Mix would compile every dependency first. In an umbrella the alias goes
in the root `mix.exs`. Does nothing without
`config :precompiled, source: ...` or `PRECOMPILED_SOURCE`.
`mix igniter.install precompiled` writes the alias and the config
(Elixir 1.18+, not in an umbrella).

`mix do clean --deps + compile` installs twice: `clean` loads paths
first, which runs the alias once before it deletes `_build`, and the
compile after it installs again. The result is correct, just one install
slower.

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