Generated Dockerfile fails to compile on arm64

[SuddenGunter]

Environment

• Elixir version (elixir -v): 1.17.2
• Phoenix version (mix deps): 1.7.14
• Operating system: Ubuntu 24.04 running Docker

Actual behavior

Arm builds inside docker fail with

8.349 Error while loading project :mime at /app/deps/mime
8.981 Segmentation fault (core dumped)
------
Dockerfile:46
--------------------
  44 |     # to be re-compiled.
  45 |     COPY config/config.exs config/${MIX_ENV}.exs config/
  46 | >>> RUN mix deps.compile
  47 |     
  48 |     COPY priv priv
--------------------
ERROR: failed to solve: process "/bin/sh -c mix deps.compile" did not complete successfully: exit code: 139

Steps to reproduce:

1. Create new Phoenix app mix phx.new multiplatform
2. Create docker release in that app mix phx.gen.release --docker
3. Try to build that Dockerfile targeting arm64

I've a sample repo that implements all 3 steps:

• link to failing pipeline, where I run Docker build in QEMU to build for arm
• https://github.com/SuddenGunter/phoenix-multiplatform

linux/amd64 image is being build fine, issue only affects arm64

Expected behavior

both amd64 and arm64 images are built correctly

[SuddenGunter]

UPD: It turns out to be an old known issue when running Erlang VM under QEMU.

• https://elixirforum.com/t/elixir-docker-image-wont-build-for-linux-arm64-v8-using-github-actions/56383/11
• https://erlangforums.com/t/beam-docker-release-github-action-a-github-action-to-build-a-docker-container-from-a-beam-elixir-erlang-release/2090/2

fixed using ENV ERL_FLAGS="+JMsingle true" in my dokerfile after FROM ${BUILDER_IMAGE} as builder line