I’d also credit reno and emilazy for driving the LLVM 19 upgrade. They used a few patches from a WIP Clang 18 branch I’d started over the summer, but they pushed the update over the finish line once breaking changes were allowed after the 24.11 release.

when Apple implemented this hardening, before it just happened to work. So, and this actually affected Nix because Nix uses the AWS C++ SDK and that stopped building
https://github.com/NixOS/nixpkgs/pull/265102

Though it turns out my actually first nixpkgs PR was fixing vscode-lldb on Darwin:
https://github.com/NixOS/nixpkgs/pull/131324

Last year, Connor Baker created a draft PR to add the missing SDK.
Connor Baker’s draft PR adding more SDKs:
https://github.com/NixOS/nixpkgs/pull/229210

Here’s that list (by GitHub id). These people were all very helpful with ensuring these Darwin improvements made it to master.staging-next with the clang 16 update (tried to get everyone who contributed during that cycle; appologies if I missed anyone):

• Atemu
• anthonyroussel
• azuwis
• boltzmannrain
• emilytrau
• josephst
• judofyr
• mfrischknech
• philiptaron
• toonn
• trofi
• wegank

Darwin SDK update. It turns out that in spite of radically changing the pattern, providing an SDK by default tends to just work.

• emilazy
• khaneliman
• paparodeo
• toonn

I also want to thank midchildan for contributing fixes to xcbuild to address some of the post-release issues users have encountered with having it in a dev shell by default. I also wanted to call out the great work getting Zed and Firefox building on Darwin with these SDK changes:

• niklaskorz (for Zed)
• booxter (for Firefox)

Note that the source for ld-prime is actually removed from the distribution. I’d package it if it were there, but it’s not.