Distrobox: emacs: Could not open file: /dev/tty

Am currently trying to automate running emacs on a Distrobox container (the Docker container is silex/emacs:29.2-alpine, although I've also tried silex/emacs:29.2 which uses a Debian image), and am getting the error emacs: Could not open file: /dev/tty. Here's what I'm doing:

distrobox create --name test --image silex/emacs:29.2-alpine --home /home/dbhome
distrobox enter test -nw -- /nix/store/emacs/bin/emacs-29.2

Which produces the mentioned error. However, running first distrobox enter test -nw, and then running /nix/store/emacs/bin/emacs-29.2 does successfully start emacs within the distrobox container. The issue is, I want to automate this emacs startup, so I need to find a way that would allow me to startup the emacs from the container from a sequence of commands ran outside the container. Anyone know what my be causing emacs: Could not open file: /dev/tty in this way? The reason I'm using Distrobox instead of just a regular container is that I eventually want to use Distrobox's ootb support for connecting to the host's X11 sockets. EDIT: strace confirms the error is -1 ENXIO (No such device or address) EDIT2: The problem subsides if we replace a bit of the docker exec command ran by distrobox enter. The docker exec command ends with CONTAINERNAME su USERNAME -c COMMAND; the issue gets fixed when we use CONTAINERNAME COMMAND directly.