diff --git a/desktop/src-tauri/build.rs b/desktop/src-tauri/build.rs
index f6240955..a5a10297 100644
--- a/desktop/src-tauri/build.rs
+++ b/desktop/src-tauri/build.rs
@@ -4,15 +4,24 @@ fn main() {
         use std::{env, path::PathBuf, process::Command};
 
         let out_dir = PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR is set by Cargo"));
+        let target = env::var("TARGET").expect("TARGET is set by Cargo");
+        let arch = match target.as_str() {
+            "aarch64-apple-darwin" => "arm64",
+            "x86_64-apple-darwin" => "x86_64",
+            _ => panic!("unsupported macOS notification bridge target: {target}"),
+        };
         let object_path = out_dir.join("macos_notifications.o");
         let source_path = PathBuf::from("src/macos_notifications.m");
 
         println!("cargo:rerun-if-changed={}", source_path.display());
+        println!("cargo:rerun-if-env-changed=TARGET");
 
         let status = Command::new("clang")
             .args([
                 "-fobjc-arc",
                 "-c",
+                "-arch",
+                arch,
                 source_path
                     .to_str()
                     .expect("notification bridge path is UTF-8"),