This sounds great. I'd love to have something like this within nix. Nix is great for full system management. Less so for something like python package manage

This sounds great. I'd love to have something like this within nix. Nix is great for full system management. Less so for something like python package management. Its lack of a dependency resolver or multiple versions of a package within the same nixpkgs instance makes it difficult to work with in some (lots of) instances. Generally, I use pipenv or poetry from within a nix flake to define the environment. Spack doesn't seem to cover system management (please correct me if I'm wrong here, but it seems to be out of scope). Combining them: using spack within a flake to define and build a set of dependencies seems like the best of both worlds. Unfortunately, at the moment, it doesn't appear to be available in nixpkgs.