FROM ubuntu:focal RUN apt-get update && apt-get install -y \ autoconf \ bc \ binutils-multiarch \ binutils-aarch64-linux-gnu \ bison \ flex \ gcc \ xz-utils \ gcc-aarch64-linux-gnu \ git \ libncurses-dev \ make \ openssl \ python-is-python3 \ && apt-get clean \ && rm -rf /var/lib/apt/lists/* COPY sources.list /etc/apt/sources.list RUN apt-get update \ && dpkg --add-architecture arm64 \ && apt-get install -y libelf-dev:arm64 \ && apt-get clean \ && rm -rf /var/lib/apt/lists/*