diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index ce9fd19..29518e7 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -28,14 +28,10 @@ jobs:
             target: x86_64
           - runner: ubuntu-22.04
             target: x86
-          # - runner: ubuntu-22.04
-          #   target: aarch64
+          - runner: ubuntu-22.04
+            target: aarch64
           - runner: ubuntu-22.04
             target: armv7
-          # - runner: ubuntu-22.04
-          #   target: s390x
-          # - runner: ubuntu-22.04
-          #   target: ppc64le
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -43,6 +39,9 @@ jobs:
           python-version: 3.x
       - name: Build wheels
         uses: PyO3/maturin-action@v1
+        env:
+          # Ensure ring's ARM assembly sees an explicit architecture on aarch64 (glibc)
+          CFLAGS_aarch64_unknown_linux_gnu: -D__ARM_ARCH=8
         with:
           target: ${{ matrix.platform.target }}
           args: --release --out dist --find-interpreter
@@ -74,6 +73,9 @@ jobs:
           python-version: 3.x
       - name: Build wheels
         uses: PyO3/maturin-action@v1
+        env:
+          # Ensure ring's ARM assembly sees an explicit architecture on aarch64 (musl)
+          CFLAGS_aarch64_unknown_linux_musl: -D__ARM_ARCH=8
         with:
           target: ${{ matrix.platform.target }}
           args: --release --out dist --find-interpreter
@@ -104,7 +106,7 @@ jobs:
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
-          args: -F python-binding --release --out dist --find-interpreter
+          args: --release --out dist --find-interpreter
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
       - name: Upload wheels
         uses: actions/upload-artifact@v4
@@ -130,7 +132,7 @@ jobs:
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
-          args: -F python-binding --release --out dist --find-interpreter
+          args: --release --out dist --find-interpreter
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
       - name: Upload wheels
         uses: actions/upload-artifact@v4
diff --git a/Cargo.lock b/Cargo.lock
index 6b774e8..6dae6d9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1317,7 +1317,7 @@ checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
 [[package]]
 name = "openai-harmony"
-version = "0.0.2"
+version = "0.0.2-alpha.1"
 dependencies = [
  "anyhow",
  "base64",
diff --git a/Cargo.toml b/Cargo.toml
index 53cd425..ea43da9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "openai-harmony"
-version = "0.0.2"
+version = "0.0.2-alpha.1"
 edition = "2021"
 license = "Apache-2.0"
 repository = "https://github.com/openai/harmony"
diff --git a/README.md b/README.md
index 1b9d4f4..6ce4885 100644
--- a/README.md
+++ b/README.md
@@ -177,10 +177,10 @@ source .venv/bin/activate
 # Install maturin and test dependencies
 pip install maturin pytest mypy ruff  # tailor to your workflow
 # Compile the Rust crate *and* install the Python package in editable mode
-maturin develop -F python-binding --release
+maturin develop --release
 ```
 
-`maturin develop -F python-binding` builds _harmony_ with Cargo, produces a native extension
+`maturin develop` builds _harmony_ with Cargo, produces a native extension
 (`openai_harmony.<abi>.so`) and places it in your virtualenv next to the pure-
 Python wrapper – similar to `pip install -e .` for pure Python projects.
 
diff --git a/pyproject.toml b/pyproject.toml
index a89a2e6..4c8ad8c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ readme = "README.md"
 demo = ["uvicorn", "fastapi"]
 
 [tool.maturin]
-features = ["pyo3/extension-module"]
+features = ["python-binding", "pyo3/extension-module"]
 module-name = "openai_harmony"
 python-source = "python"
 
diff --git a/test_python.sh b/test_python.sh
index 09a24de..51176a7 100755
--- a/test_python.sh
+++ b/test_python.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 set -e
 source .venv/bin/activate
-maturin develop -F python-binding --release 
+maturin develop --release 
 pytest "$@"