13:28 <dmj`> I'm attempting to build a haskell project with some objective-C code using nix, am specifying the path to xcode and UIKit related headers in buildInputs. I receive " fatal error: 'os/availability.h' file not found" when calling nix-build. I found someone else had this issue as well, https://github.com/NixOS/nixpkgs/issues/23859 which seems to be due to some impurities, any ideas how to properly reference UIKit from nix?

13:28 <{^_^}> #23859 (by ftpronk, 2 years ago, open): fatal error: 'os/availability.h' file not found #include <os/availability.h>

13:29 <dmj`> for reference here is my default.nix https://gist.github.com/529027c1f98a98ad9944f07c2ac461f3