Dockerfile

FROM ubuntu:20.04

RUN apt-get update
RUN DEBIAN_FRONTEND=noninteractive apt-get install -y sudo curl emacs git

RUN mkdir /nix
RUN chmod a+rwx /nix
RUN adduser user --home /home/user --disabled-password --gecos "" --shell /bin/bash

USER user
WORKDIR /home/user

RUN curl -L https://nixos.org/nix/install | sh

ENV NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
ENV NIX_PATH=/home/user/.nix-defexpr/channels
ENV NIX_PROFILES="/nix/var/nix/profiles/default /home/user/.nix-profile"
ENV PATH="/home/user/.nix-profile/bin:$PATH"

COPY nix_static.nix nix_static.nix

RUN nix-build nix_static.nix

nix_static.nix

let
  nixpkgs = builtins.fetchGit {
    url = "https://github.com/NixOS/nixpkgs.git";
    rev = "a6133b7a396816e3e9248ee657f21e4245607e75"; # f1680774340d5443a1409c3421ced84ac1163ba9";
    ref = "master";
  };

  config = {
    nix = {
      storeDir = "/nix_frozen/store";
      stateDir = "/nix_frozen/var";
    };
  };

  pkgs = import nixpkgs { inherit config; };

in

pkgs.pkgsStatic.nix