Question: How to interact with sub-shell created from the main shell

[hvaoc]

I am trying to make the ssh connection to enable a nix-shell and run few commands inside.

Sequence is like this

ssh user@192.168.1.10
ENTER password
cd /main
nix-shell node.nix <- It works up to this point, now here it enters sub shell session and I am not able to interact with this sub shell.
nix-shell > node -v <- this is not entered in the nix-shell but runs on the parent shell and ends in error