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Comment by mkleczek | Hacker News Reader

That won't cut it as I need a multi-language build.

And don't get me wrong - I know it _can_ be done in Nix (as it is a programming language) - the question is _how easy_ it is to create/maintain it.

Let's say my solution requires a Java Spring Boot application, React client, custom Postgres extension and Python ML code.

Well, you can provide in your environment all the binaries needed:

- Java stuff

- node and npm

- I don't know what you would need for Postgres extensions

- Python, pip or poetry (or whatever you use for Python package management)

Here is an example flake: https://bpa.st/ZUQQ

Under `devShells`, you have `packages`. You can put there any package from nixpkgs, not just Python packages like I have there.

To make it cleaner, you could have a variable for each platform and concatenate them under packages like

    `packages = javaPkgs ++ nodePkgs ++ pgPkgs ++ pyPkgs`.