How does one initialize opam inside a Dockerfile?

I've created docker images with opam before but idk why this one is not working. I start from a image that already has opam but that doesn't seem to work, Dockerfile:

FROM continuumio/miniconda3
#FROM ocaml/opam:latest
FROM ruby:3.1.2

MAINTAINER Brando Miranda "brandojazz@gmail.com"

RUN apt-get update \
  && apt-get install -y --no-install-recommends \
    ssh \
    git \
    m4 \
    libgmp-dev \
    wget \
    ca-certificates \
    rsync \
    strace \
    gcc \
    rlwrap \
    sudo \
    lsb-release \
    opam
# RUN apt-get clean all

# - most likely won't work, for now I don't have a solution for ruby on docker container ubuntu: https://stackoverflow.com/questions/74695464/why-cant-i-install-ruby-3-1-2-in-linux-docker-container?noredirect=1#comment131843536_74695464
#RUN apt-get install -y --no-install-recommends rbenv
#RUN apt-get install -y --no-install-recommends ruby-build
#RUN apt-get install -y --no-install-recommends ruby-full
#RUN rbenv install 3.1.2
#RUN rbenv global 3.1.2

# https://github.com/giampaolo/psutil/pull/2103

RUN useradd -m bot
# format for chpasswd user_name:password
RUN echo "bot:bot" | chpasswd
RUN adduser bot sudo

WORKDIR /home/bot
USER bot

ADD https://api.github.com/repos/IBM/pycoq/git/refs/heads/main version.json

# -- setup opam like VP's PyCoq
# https://stackoverflow.com/questions/74711264/how-does-one-initialize-opam-inside-a-dockerfile
RUN opam init --disable-sandboxing

Error:

(meta_learning) brandomiranda~/pycoq ❯ docker build -t brandojazz/pycoq:latest_arm .
[+] Building 8.6s (12/34)
 => [internal] load build definition from Dockerfile                                                                                               0.0s
 => => transferring dockerfile: 3.56kB                                                                                                             0.0s
 => [internal] load .dockerignore                                                                                                                  0.0s
 => => transferring context: 2B                                                                                 开发者_如何学JAVA                                   0.0s
 => [internal] load metadata for docker.io/library/ruby:3.1.2                                                                                      0.0s
 => CACHED [stage-1  1/30] FROM docker.io/library/ruby:3.1.2                                                                                       0.0s
 => CACHED https://api.github.com/repos/IBM/pycoq/git/refs/heads/main                                                                              0.0s
 => [stage-1  2/30] RUN apt-get update   && apt-get install -y --no-install-recommends     ssh     git     m4     libgmp-dev     wget     ca-cert  3.8s
 => [stage-1  3/30] RUN useradd -m bot                                                                                                             0.3s
 => [stage-1  4/30] RUN echo "bot:bot" | chpasswd                                                                                                  0.3s
 => [stage-1  5/30] RUN adduser bot sudo                                                                                                           0.3s
 => [stage-1  6/30] WORKDIR /home/bot                                                                                                              0.0s
 => [stage-1  7/30] ADD https://api.github.com/repos/IBM/pycoq/git/refs/heads/main version.json                                                    0.0s
 => ERROR [stage-1  8/30] RUN opam init --disable-sandboxing                                                                                       3.7s
------
 > [stage-1  8/30] RUN opam init --disable-sandboxing:
#12 0.123 [NOTE] Will configure from built-in defaults.
#12 0.127 Checking for available remotes: rsync and local, git, mercurial.
#12 0.132   - you won't be able to use darcs repositories unless you install the darcs command on your system.
#12 0.132
#12 0.141
#12 0.141 <><> Fetching repository information ><><><><><><><><><><><><><><><><><><><><><>
#12 3.718 [ERROR] Could not update repository "default": Failed to extract archive /tmp/opam-7-6d07ae/index.tar.gz: "/bin/tar xfz /tmp/opam-7-6d07ae/index.tar.gz -C /home/bot/.opam/repo/default.new" exited with code 2
#12 3.718 [ERROR] Initial download of repository failed
------
executor failed running [/bin/sh -c opam init --disable-sandboxing]: exit code: 40

How do I fix this?