This image contains an installation of the Nix package manager installed as a single-user nixuser.
This is based on the unpublished Dockerfile of https://github.com/romcheck/nix.
Use this build to create your own customized images as follows:
FROM fretlink/nix
RUN nix-channel --add https://nixos.org/channels/nixpkgs-unstable nixpkgs
RUN nix-channel --update
RUN nix-build -A pythonFull '<nixpkgs>'