I’d like to run code as a user inside containers using shell.nix.
When I start a container, docker run --rm -it nixos/nix, there are no useradd nor adduser commands.
I add one using nix-env -iA nixpkgs.shadow, but after that when I run useradd someuser, I get an error: “cannot open /etc/passwd”.
The same thing happens when I try to do this in Dockerfile. I could just use the debian base image and install nix the usual way using the installer script, but maybe there’s a way to do this using the nixos/nix image?