It might be best to hold off on this for now unless there's a pressing need, as the upcoming SDK rework is likely to change this interface again (to something much simpler, thankfully).

To add some detail and background: overrideSDK was added at literally the last minute to 23.11. I had to add it during the final staging-next cycle to fix curl because otherwise it was going to break things propagating frameworks. That version was incomplete. I improved it for 24.05, but I realized during that work it would not be possible to implement it generally. In particular, anything that is a dependency but not an input is invisible to it (e.g., in a hook or a file or a string).

The Darwin refactor will turn the SDK into a normal package. If you need the 11.x SDK, you add apple-sdk_11 as a build input. If your package exposes the SDK as part of its public API, you can propagate it. This will all work as expected for a normal package. If you need to set the deployment target, you will be able to use darwinDeploymentTargetHook to do that.

Another aspect of this is I am reworking how SDKs are built. I have the 10.12 through 14.4 SDKs in my WIP branch. They all build, and they all have source-based components. There’s not going to be a difference in SDKs between Darwin platforms other than what’s available. xcrun will also be available in the stdenv, pointing the nixpkg SDK and binaries.

I have a very WIP branch available at https://github.com/reckenrode/nixpkgs/tree/darwin-sdk-refactor. It’s very messy (because I’m using an adapter right now to avoid stdenv bootstraps), but the core of it works. I have successfully built Wine, MoltenVK, RPM, xcbuild, and btop with appropriate SDKs. It’s very unlikely this will land for the next staging-next cycle (because I still have to sort out bootstrapping the stdenv), but it may the one after that, and it will definitely be in 24.11.

The new SDK stuff is at #346043. For Go’s purpose, you’ll want to propagate the minimum SDK and deployment target like I did for Swift in #346947.

If you don’t mind, I added this PR to the follow up tracking list at #346043.

@ofborg eval

@ofborg eval

Not sure why ofborg won’t eval. Can you try rebasing this on the latest staging to kick it into gear?

Not much point waiting for ofborg, the eval queue is ~90.

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/title-the-darwin-sdks-have-been-updated/55295/1