Vagrantfile demonstrating Elixir runtime issue when compiled from source on OpenBSD 6.6

Vagrantfile

Vagrant.configure("2") do |config|
  config.vm.box = "generic/openbsd6"

  config.vm.provision "shell", inline: <<~SCRIPT
    #!/usr/bin/env bash
    set -xe

    orig_dir=`pwd`

    OTP_VER="21.3.8.14"
    ELIXIR_VER="1.10.2"
    export AUTOCONF_VERSION=2.69

    # Set encoding
    export LC_CTYPE=en_US.UTF-8
    echo "export LC_CTYPE=en_US.UTF-8" >> /etc/profile

    # Install required software; force non-interactive mode
    pkg_add -I autoconf-${AUTOCONF_VERSION}p2 gmake

    # Download and unpack OTP
    prefix=OTP-$OTP_VER
    wget https://github.com/erlang/otp/archive/$prefix.tar.gz
    tar -zxf $prefix.tar.gz
    cd otp-$prefix

    # Install OTP
    ./otp_build autoconf
    ./configure
    gmake
    sudo gmake install

    # Download and unpack Elixir
    cd $orig_dir
    prefix=v$ELIXIR_VER
    wget https://github.com/elixir-lang/elixir/archive/$prefix.tar.gz
    tar -zxf $prefix.tar.gz
    cd elixir-$ELIXIR_VER

    # Install Elixir
    gmake clean test

    # Add Elixir binaries to PATH
    cwd=`pwd`
    echo "export PATH=$cwd/bin:$PATH" >> /etc/profile

    # Is it working?
    bin/elixir -e 'IO.puts("Hello World!")'
  SCRIPT
end