alter the location of the _build dir Mix uses

Question

In the process of building project with Mix I have the req of placing the result of the build in another dir.

Mix normally places the build artefacts in /project_path/_build.
I cannot write anything to /project_path during the actual build.

Can I change the output dir? Is this something that can be easily adjusted?

Answer 1

Based on this, you can specify a keyword list member build_path to override the default _build directory.

Example:

def project do
    [app: :my_app,
    version: "0.0.1",
    elixir: "~> 1.2",
    build_embedded: Mix.env == :prod,
    start_permanent: Mix.env == :prod,
    build_path: "custom_build_dir",
    deps: deps]
end