build windows arm separately

.github/workflows/CI.yml

@@ -110,9 +110,6 @@ jobs:
           - runner: windows-latest
             target: x86
             python_arch: x86
-          - runner: windows-11-arm
-            target: aarch64
-            python_arch: arm64
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
@@ -141,6 +138,30 @@ jobs:
           name: wheels-windows-${{ matrix.platform.target }}
           path: dist
 
+  # Free-threaded 3.14t wheels for windows-11-arm are skipped: the runner image
+  # ships with Python 3.14 GIL preinstalled, which breaks setup-python's 3.14t
+  # install. Tracked upstream at
+  # https://github.com/actions/partner-runner-images/issues/154
+  windows_arm:
+    runs-on: windows-11-arm
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
+        with:
+          python-version: 3.13
+          architecture: arm64
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: aarch64
+          args: --release --out dist
+          sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
+      - name: Upload wheels
+        uses: actions/upload-artifact@v6
+        with:
+          name: wheels-windows-aarch64
+          path: dist
+
   macos:
     runs-on: ${{ matrix.platform.runner }}
     strategy:
@@ -195,7 +216,7 @@ jobs:
     name: Release
     runs-on: ubuntu-latest
     if: ${{ startsWith(github.ref, 'refs/tags/') || github.event_name == 'workflow_dispatch' }}
-    needs: [linux, musllinux, windows, macos, sdist]
+    needs: [linux, musllinux, windows, windows_arm, macos, sdist]
     permissions:
       # Use to sign the release artifacts
       id-token: write