darwin.hfs: mark broken

pkgs/os-specific/darwin/apple-source-releases/hfs/default.nix

@@ -5,4 +5,10 @@ appleDerivation {
     mkdir -p $out/include/hfs
     cp core/*.h $out/include/hfs
   '';
+
+  meta = {
+    # Seems nobody wants its binary, so we didn't implement building.
+    broken = !headersOnly;
+    platforms = lib.platforms.darwin;
+  };
 }