minimal requirements to build and install zig from scratch with docker

build_zig.sh

#!/usr/bin/env bash

set -e
set -x

git clone https://github.com/ziglang/zig
cd zig
mkdir build && cd build
cmake ..
make

Dockerfile

FROM ubuntu:18.04
ENV DEBIAN_FRONTEND=noninteractive
WORKDIR /root
COPY . .

RUN apt update
RUN apt -y upgrade
RUN apt -y install apt-utils apt-transport-https ca-certificates
RUN apt -y install wget gpg

RUN echo "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-11 main" >> /etc/apt/sources.list
RUN echo "deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial-11 main" >> /etc/apt/sources.list
RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
RUN apt update

RUN apt -y install git cmake make gcc g++
RUN apt -y install llvm-11 llvm-11-dev
RUN apt -y install clang-11 libclang-11-dev
RUN apt -y install lld-11 liblld-11-dev

RUN ./build_zig.sh