nixos

[tru@elitebook840g3 ~]$ docker images nixery.dev/shell/bash
REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
nixery.dev/shell/bash   latest              4edc2efa819a        292 years ago       105 MB
[tru@elitebook840g3 ~]$ docker run -ti nixery.dev/shell/bash bash
bash-5.1# ls -ld /
dr-xr-xr-x 14 0 0 15 Oct 26 22:37 /
bash-5.1# 

as / is not

Otherwise one might get an error like:

cachix push /nix/store/7i1kqf6x52l1fhqqdmqgggjr0zigggik-cachix-0.1.3/bin/cachix

NoInput "You need to specify store paths either as stdin or as a cli argument"

NixOS/nixpkgs#125598 (comment), specifically containers/podman#9169

Possible issue containers/podman#10672 (not sure if "internal" network is used)

Ideally it just works and all that's needed is a one or two lines of docs.