Update Nixpkgs to 24.11 and Rust to 1.83.0 (#109)

flake.nix

@@ -4,7 +4,7 @@
 
   # specify all input dependencies needed to create the outputs of the flake
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs?ref=24.05";
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-24.11";
 
     # utility to iterate over multiple target platforms
     flake-parts.url = "github:hercules-ci/flake-parts";
@@ -61,7 +61,7 @@
               inherit system overlays;
             };
 
-            rustVersion = "1.81.0";
+            rustVersion = "1.83.0";
 
             # define Rust toolchain version and targets to be used in this flake
             rust = (pkgs.rust-bin.stable.${rustVersion}.minimal.override
@@ -87,6 +87,10 @@
 
                 # Crane doesn't know which version to select from a workspace, so we tell it where to look
                 crateInfo = craneLib.crateNameFromCargoToml { cargoToml = inputs.holochain + "/crates/holochain/Cargo.toml"; };
+
+                # On intel macs, the default SDK is still 10.12 and Holochain won't build against that because we're
+                # using a newer Go version. So override with the newest SDK available for x86_64-darwin.
+                apple_sdk = if system == "x86_64-darwin" then [ pkgs.apple-sdk_10_15 ] else [ ];
               in
               craneLib.buildPackage {
                 pname = "holochain";
@@ -101,7 +105,8 @@
                 buildInputs = [
                   pkgs.go
                   pkgs.perl
-                ];
+                ] ++ (pkgs.lib.optionals pkgs.stdenv.isDarwin apple_sdk);
+
                 # Build Holochain, CLI and local services (bootstrap + signal server) binaries.
                 # Pass extra arguments like feature flags to build command.
                 cargoExtraArgs = "--bin holochain --bin hc --bin hc-sandbox --bin hcterm --bin hc-run-local-services " + cargoExtraArgs;