Nerves

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Either works:

  • the alias from Setup, as for any project. nerves_bootstrap prepends its own steps to the same alias, so the Nerves environment is set before ours runs;
  • or the nerves feat/precompiled branch (nerves-project/nerves#1220), whose nerves.init calls this library itself: {:nerves, github: "TomHoenderdos/nerves", branch: "feat/precompiled", runtime: false}. With it, mix nerves.info repeats the last run. The hook it calls is Precompiled.Host.run/1; a fork built against the pre-rename module name must be updated to it.

Both together are fine: a second call in one Mix run reuses the first.

Builds made for a Nerves system need the fork: the system and its version come from its Nerves.build_plan/0, which released nerves 1.x does not have. With released nerves the alias still works, but only pure_elixir builds match (rule 1 of What matches; rule 8 still applies) and every other dependency compiles from source.

All of the above runs on the build host. To install on the running device itself, from an IEx shell on it, see On a device.