Yes, that is correct. Unfortunately, by default, Nix uses dynamic libraries and their FULL package (man pages and everything included).

I later learned of pkgsStatic; an overlay in nixpkgs that focuses entirely on static things. With that, and then using nix-store -qa $folder, I saw MUCH less garbage inbetween. So, pkgsStatic (or perhaps pkgsMusl, also a thing) is a good solution for using a multi stage docker container with Nix - this way, it only returns what you really and actually need.

But, I am also still learning... ^^'