Nix is nice as a catch-all, and especially good when languages like C and C++ don't have popular package managers. It's definitely not better than cargo or pip when dealing with just Rust or Python, but it's definitely relevant when you're building multiple languages.
I would love to see an evolution of nixpkgs with more of a starlark-style for package declarations.
I would love to see an evolution of nixpkgs with more of a starlark-style for package declarations.