An example Swift package, packaged with Nix.

This repository is designed to be a template for Nix-packaged Swift Package Manager projects.

Adding Apple libraries:

You don't need to do anything to add libraries in the SDK. Just import them in Swift.

That said, if you do import Apple libraries, you'll want to update default.nix to note that the supported platforms are only Darwin.

You may also need to add a newer version of the SDK to buildInputs, since nixpkgs defaults to an older version of the SDK

Adding SPM packages:

Edit Package.swift as normal, run swift package resolve, and then run swiftpm2nix from nixpkgs.