dream2nix VS nix-npm-buildpackage

(I'm on the flox team) we'd love to support that and it's something we've talked about! We already support auto-generation for some languages like Rust because they have a lockfile (e.g. Cargo.lock), but it's a bit trickier for a requirements.txt. We hope at some point to contribute to/integrate with upstream efforts like dream2nix which have auto-generation as their goal

How about dream2nix? I like to use the nix way, but there are many third nix ways

I'm not 100% sure, but looking at the docs [here](https://nix-community.github.io/dream2nix/subsystems/node.html#granular-pure-default) and the implementation [here](https://github.com/nix-community/dream2nix/tree/main/src/subsystems/nodejs/builders/granular-nodejs) it seems as it builds dependencies separately and symlinks (see `install-deps.py` those into a `node_modules` tree. I don't know much about Yarn's PNP (was doing more backend/devex last few years), but it sounds vaguely similar in that each package should be built once as a separate derivation and then symlinked to a big `node_modules`-as-a-symlink-tree derivation?

How are you building your NodeJS project with Nix right now? Recently I spot a new abstraction, it looks good but I havn't tried it yet: https://github.com/nix-community/dream2nix

dream2nix is a great package, that makes a nix-derivation out of node project with the minimal flake

The DavHau/dream2nix project aims to be a generic solution for this issue by splitting the problem into specific stages, each of which can be configured individually (e.g., changing the level of purity)

https://github.com/serokell/nix-npm-buildpackage .

The struggle began when I tried to set up nix build to build my webapp. The issue is that clojure have some dependencies and npm has other dependencies. First I managed to get all nom dependencies included by using npm-buildpackage. This seems to be working correctly. However when building the application with shadow-cljs it fails. My guess is that it fails when trying to get dependencies from my deps.edn file.

I’ve spent too much time trying to make mkYarnPackage from nixpkgs to work and finally found https://github.com/serokell/nix-npm-buildpackage, which at least for yarn pretty much worked out of the box for me.

I usually got by with the python stuff in nixpkgs. Other than that for applications I would probably recommend poetry2nix as mentioned. For the nodejs I would use https://github.com/serokell/nix-npm-buildpackage