Updated to run with elixir 1.18.1
with nuked _build, deps and mix.lock running mix deps.get in the submodule in the Docker container first get the jason error
Error while loading project :jason at /my_umbrella_project/my_submodule/deps/jason
** (ArgumentError) could not call Module.put_attribute/3 because the module Nerves.MixProject is already compiled
(elixir 1.18.1) lib/module.ex:2398: Module.assert_not_readonly!/2
(elixir 1.18.1) lib/module.ex:2079: Module.__put_attribute__/5 /my_umbrella_project/my_submodule/deps/jason/mix.exs:2: (module)
But running mix deps.get a second time it builds perfectly fine.


















