diff --git a/.github/workflows/python-build.yml b/.github/workflows/python-build.yml
index eb5bd7a..c9b298f 100644
--- a/.github/workflows/python-build.yml
+++ b/.github/workflows/python-build.yml
@@ -1,6 +1,3 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-
 name: Build
 
 on:
@@ -12,22 +9,29 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.11', '3.12' ]
-        os: [ macos-15, macos-15-intel, windows-2025 ]
-
-    runs-on: ${{ matrix.os }}
+        cfg:
+          - { os: windows-2025, python-version: '3.11', architecture: x64 }
+          - { os: windows-2025, python-version: '3.12', architecture: x64 }
+          - { os: windows-11-arm, python-version: '3.11', architecture: arm64 }
+          - { os: windows-11-arm, python-version: '3.12', architecture: arm64 }
+          - { os: macos-15, python-version: '3.11', architecture: arm64 }
+          - { os: macos-15, python-version: '3.12', architecture: arm64 }
+
+    runs-on: ${{ matrix.cfg.os }}
+    timeout-minutes: 45
     defaults:
       run:
         shell: bash
 
     steps:
     - name: Clone
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: ${{ matrix.cfg.python-version }}
+        architecture: ${{ matrix.cfg.architecture }}
 
     - name: Setup cmake
       uses: jwlawson/actions-setup-cmake@v2
diff --git a/.github/workflows/python-stylecheck.yml b/.github/workflows/python-stylecheck.yml
index b2a92a1..a326557 100644
--- a/.github/workflows/python-stylecheck.yml
+++ b/.github/workflows/python-stylecheck.yml
@@ -1,33 +1,27 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-
 name: Stylecheck
 
 on:
   push:
     branches:
-      - master
-      - main
       - '[0-9]+.[0-9]+'
       - '[0-9]+.[0-9]+.[0-9]+'
   pull_request:
 
 jobs:
   stylecheck:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
 
     steps:
     - name: Clone
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: 3.12
+        python-version: '3.12'
 
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
         pip install black
 
     - name: run stylecheck
diff --git a/.github/workflows/python-unittests.yml b/.github/workflows/python-unittests.yml
index bc265ea..8c46d62 100644
--- a/.github/workflows/python-unittests.yml
+++ b/.github/workflows/python-unittests.yml
@@ -1,13 +1,8 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-
 name: Unittests
 
 on:
   push:
     branches:
-      - master
-      - main
       - '[0-9]+.[0-9]+'
       - '[0-9]+.[0-9]+.[0-9]+'
   pull_request:
@@ -17,10 +12,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.11', '3.12' ]
-        os: [ macos-15, macos-15-intel, windows-2025, ubuntu-24.04 ]
+        cfg:
+          - { os: windows-2025, python-version: '3.11', architecture: x64 }
+          - { os: windows-2025, python-version: '3.12', architecture: x64 }
+          - { os: windows-11-arm, python-version: '3.11', architecture: arm64 }
+          - { os: windows-11-arm, python-version: '3.12', architecture: arm64 }
+          - { os: macos-15-intel, python-version: '3.11', architecture: x64 }
+          - { os: macos-15-intel, python-version: '3.12', architecture: x64 }
+          - { os: macos-15, python-version: '3.11', architecture: arm64 }
+          - { os: macos-15, python-version: '3.12', architecture: arm64 }
+          - { os: ubuntu-24.04, python-version: '3.11', architecture: x64 }
+          - { os: ubuntu-24.04, python-version: '3.12', architecture: x64 }
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ${{ matrix.cfg.os }}
     timeout-minutes: 45
     defaults:
       run:
@@ -28,19 +32,20 @@ jobs:
 
     steps:
     - name: Clone
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: ${{ matrix.cfg.python-version }}
+        architecture: ${{ matrix.cfg.architecture }}
 
     - name: Setup cmake
       uses: jwlawson/actions-setup-cmake@v2
         
     - name: Build
       run: |
-        pip install -v .[dev]
+        pip install .
         
     - name: Test with unittest
       run: python -m unittest discover -v -s tests
diff --git a/setup.py b/setup.py
index 9d3ddee..5b3844b 100644
--- a/setup.py
+++ b/setup.py
@@ -5,6 +5,7 @@
 import platform
 from tempfile import TemporaryDirectory
 from typing import TypeAlias, TYPE_CHECKING, Mapping
+import sysconfig
 
 from setuptools import setup, Extension, Command
 from setuptools.command.build_ext import build_ext
@@ -39,10 +40,14 @@ def build_extension(self, ext: Extension) -> None:
         platform_args = []
         if sys.platform == "win32":
             platform_args.extend(["-G", "Visual Studio 17 2022"])
-            if sys.maxsize > 2**32:
+            if sysconfig.get_platform() == "win-amd64":
                 platform_args.extend(["-A", "x64"])
-            else:
+            elif sysconfig.get_platform() == "win32":
                 platform_args.extend(["-A", "Win32"])
+            elif sysconfig.get_platform() == "win-arm64":
+                platform_args.extend(["-A", "ARM64"])
+            else:
+                raise RuntimeError(f"Unsupported platform: {sysconfig.get_platform()}")
             platform_args.extend(["-T", "v143"])
         elif sys.platform == "darwin":
             if platform.machine() == "arm64":
@@ -57,7 +62,7 @@ def build_extension(self, ext: Extension) -> None:
                 [
                     "cmake",
                     *platform_args,
-                    f"-DPython3_ROOT_DIR={sys.base_prefix}",
+                    f"-DPython3_EXECUTABLE={fix_path(sys.executable)}",
                     f"-Dpybind11_DIR={fix_path(pybind11.get_cmake_dir())}",
                     f"-Damulet_pybind11_extensions_DIR={fix_path(amulet.pybind11_extensions.__path__[0])}",
                     f"-Damulet_rocksdb_DIR={fix_path(rocksdb_src_dir)}",
diff --git a/tools/cmake_generate.py b/tools/cmake_generate.py
index e001ceb..33c39bd 100644
--- a/tools/cmake_generate.py
+++ b/tools/cmake_generate.py
@@ -2,6 +2,7 @@
 import subprocess
 import os
 import shutil
+import sysconfig
 
 import pybind11
 import amulet.pybind11_extensions
@@ -18,10 +19,14 @@ def main() -> None:
     platform_args = []
     if sys.platform == "win32":
         platform_args.extend(["-G", "Visual Studio 17 2022"])
-        if sys.maxsize > 2**32:
+        if sysconfig.get_platform() == "win-amd64":
             platform_args.extend(["-A", "x64"])
-        else:
+        elif sysconfig.get_platform() == "win32":
             platform_args.extend(["-A", "Win32"])
+        elif sysconfig.get_platform() == "win-arm64":
+            platform_args.extend(["-A", "ARM64"])
+        else:
+            raise RuntimeError(f"Unsupported platform: {sysconfig.get_platform()}")
         platform_args.extend(["-T", "v143"])
 
     os.chdir(RootDir)
@@ -33,7 +38,7 @@ def main() -> None:
         [
             "cmake",
             *platform_args,
-            f"-DPython3_ROOT_DIR={sys.base_prefix}",
+            f"-DPython3_EXECUTABLE={fix_path(sys.executable)}",
             f"-Dpybind11_DIR={fix_path(pybind11.get_cmake_dir())}",
             f"-Damulet_pybind11_extensions_DIR={fix_path(amulet.pybind11_extensions.__path__[0])}",
             f"-Damulet_rocksdb_DIR={fix_path(os.path.join(RootDir, 'src', 'amulet', 'rocksdb'))}",