Here is a personal anecdote: Managing multiple versions of openCV on OS X. OpenCV has a long laundry list of dependencies and trying to get two versions to buil

Here is a personal anecdote: Managing multiple versions of openCV on OS X. OpenCV has a long laundry list of dependencies and trying to get two versions to build can be a nightmare. (It's much easier to just update one of your projects to use the same version of OpenCV as the other one.) With Nix each of those OpenCV versions can live completely isolated from each other so their dynamically linked dependencies don't get overridden by each other.