Been using Devbox recently both at work and for personal projects and I can only say good things. It abstracts away the complexity of nix, defining the dependencies in a simple json with a lock file, the shell starts quite fast and from then on you have everything under your PATH, and it works the same in macOS and Linux.

Also, as a benefit, by tracking the JSON and lockfile, the CI can work with the exact same environment. I highly recommend giving it a try.