diff --git a/build.zig.zon b/build.zig.zon
index f80cd53b3..e6141add7 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -26,10 +26,7 @@
             .lazy = true,
         },
         .zig_objc = .{
-            // mitchellh/zig-objc
-            .url = "https://deps.files.ghostty.org/zig_objc-f356ed02833f0f1b8e84d50bed9e807bf7cdc0ae.tar.gz",
-            .hash = "zig_objc-0.0.0-Ir_Sp5gTAQCvxxR7oVIrPXxXwsfKgVP7_wqoOQrZjFeK",
-            .lazy = true,
+            .path = ".libghostty-spm/zig_objc",
         },
         .zig_js = .{
             // mitchellh/zig-js
diff --git a/pkg/macos/video/display_link.zig b/pkg/macos/video/display_link.zig
index 4866531f2..18e9e40ec 100644
--- a/pkg/macos/video/display_link.zig
+++ b/pkg/macos/video/display_link.zig
@@ -2,6 +2,8 @@ const std = @import("std");
 const assert = std.debug.assert;
 const Allocator = std.mem.Allocator;
 const c = @import("c.zig").c;
+extern "c" fn ghostty_arm64e_sign_function(*const anyopaque) *const anyopaque;
+
 
 pub const DisplayLink = opaque {
     pub const Error = error{
@@ -58,7 +60,7 @@ pub const DisplayLink = opaque {
     ) Error!void {
         if (c.CVDisplayLinkSetOutputCallback(
             @ptrCast(self),
-            @ptrCast(&(struct {
+            @ptrCast(@alignCast(ghostty_arm64e_sign_function(@ptrCast(&(struct {
                 fn callback(
                     displayLink: *DisplayLink,
                     inNow: *const c.CVTimeStamp,
@@ -78,7 +80,7 @@ pub const DisplayLink = opaque {
                     );
                     return c.kCVReturnSuccess;
                 }
-            }).callback),
+            }).callback)))),
             userinfo,
         ) != c.kCVReturnSuccess)
             return error.InvalidOperation;