I’m not a Nix user, but doesn’t Nix make both pip and venv obsolete in a way? Nix is a package manager (which could be used to package anything including Python packages/modules) and also allows you to create environments that include only certain packages of certain versions.
German has the term raubkopieren for piracy which translated literally means theft-copying. I kind of find that term funny because somehow it makes it sound even worse than just piracy, since with pirates we at least have the pop fiction image of the pirate, and because it has a paradoxical sound to it (“how can you steal something by copying?”).