diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 14628bbd..16441213 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,5 +57,9 @@ jobs:
         run: zig build test
         env:
           AGREE: true
+      - name: mach::test cross x86_64-macos -> aarch64-macos
+        run: zig build test -Dtarget=aarch64-macos
+        env:
+          AGREE: true
       - name: webgpu::test
         run: cd webgpu && zig build test
diff --git a/README.md b/README.md
index e2681de2..917a2d07 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Mach is still incredibly early stages, so far we have support for building from
 | Building for     | From macOS x86_64 | From macOS M1/aarch64 | From Linux x86_64 | From Windows x86_64 |
 |------------------|-------------------|-----------------------|-------------------|---------------------|
 | macOS x86_64     | ✅                | ✔️ #7                  | ✅                | ⚠️ #8               |
-| macOS M1/aarch64 | ✔️                 | ✅                    | ✔️                 | ⚠️ #8               |
+| macOS M1/aarch64 | ✅                | ✅                    | ✔️                 | ⚠️ #8               |
 | Linux x86_64     | 🏃                | 🏃                     | 🏃                | 🏃                  |
 | Windows x86_64   | 🏃                | 🏃                     | 🏃                | 🏃                  |
 | iOS              | 🏃                | 🏃                     | 🏃                | 🏃                  |