libghostty-vt: support building nix derivation on darwin

nix/libghostty-vt.nix

@@ -7,7 +7,10 @@
   runCommand,
   stdenv,
   testers,
+  fixDarwinDylibNames,
   versionCheckHook,
+  darwin,
+  xcbuild,
   zig_0_15,
   revision ? "dirty",
   optimize ? "Debug",
@@ -18,10 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "0.1.0-dev+${revision}-nix";
 
   # We limit source like this to try and reduce the amount of rebuilds as possible
-  # thus we only provide the source that is needed for the build
-  #
-  # NOTE: as of the current moment only linux files are provided,
-  # since darwin support is not finished
+  # thus we only provide the source that is needed for the build.
   src = lib.fileset.toSource {
     root = ../.;
     fileset = lib.fileset.intersection (lib.fileset.fromSource (lib.sources.cleanSource ../.)) (
@@ -39,27 +39,37 @@ stdenv.mkDerivation (finalAttrs: {
 
   deps = callPackage ../build.zig.zon.nix {name = "${finalAttrs.pname}-cache-${finalAttrs.version}";};
 
-  nativeBuildInputs = [
-    git
-    pkg-config
-    zig_0_15
-  ];
+  nativeBuildInputs =
+    [
+      git
+      pkg-config
+      zig_0_15
+    ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
+      darwin.cctools
+      fixDarwinDylibNames
+      xcbuild
+    ];
 
   buildInputs = [];
 
   doCheck = false;
   dontSetZigDefaultFlags = true;
 
-  zigBuildFlags = [
-    "--system"
-    "${finalAttrs.deps}"
-    "-Dlib-version-string=${finalAttrs.version}"
-    "-Dcpu=baseline"
-    "-Doptimize=${optimize}"
-    "-Dapp-runtime=none"
-    "-Demit-lib-vt=true"
-    "-Dsimd=${lib.boolToString simd}"
-  ];
+  zigBuildFlags =
+    [
+      "--system"
+      "${finalAttrs.deps}"
+      "-Dlib-version-string=${finalAttrs.version}"
+      "-Dcpu=baseline"
+      "-Doptimize=${optimize}"
+      "-Dapp-runtime=none"
+      "-Demit-lib-vt=true"
+      "-Dsimd=${lib.boolToString simd}"
+    ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
+      "-Demit-xcframework=false"
+    ];
   zigCheckFlags = finalAttrs.zigBuildFlags ++ ["test-lib-vt"];
 
   outputs = [