diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4030e194..87d276cc 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -12,14 +12,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12", "3.13", "3.14"]
+        python-version: ["py311", "py312", "py313", "py314"]
         # macos-15-large is an intel runner, macos-14 is an arm64 runner
         platform: [ubuntu-latest, ubuntu-22.04-arm, windows-latest, macos-15-large, macos-14]
 
-    defaults:
-      run:
-        shell: bash -el {0}
-
     steps:
       - name: Checkout source
         uses: actions/checkout@v5
@@ -27,42 +23,18 @@ jobs:
           submodules: recursive
           fetch-depth: 0 # required for version resolution
 
-      - name: Set up Conda
-        uses: conda-incubator/setup-miniconda@v3.2.0
+      - name: Set up Pixi
+        uses: prefix-dev/setup-pixi@v0.9.4
         with:
-          channels: conda-forge
-          miniforge-version: latest
-          python-version: ${{ matrix.python-version }}
-
-      - name: Install compilers
-        run: conda install -y c-compiler cxx-compiler
-
-      - name: Install clang
-        if: matrix.platform == 'macos-15-large'
-        run: conda install -y 'clang>=12.0.1,<17'
-
-      - name: Show conda environment info
-        run: |
-          conda info
-          conda config --show-sources
-          conda list --show-channel-urls
-
-      - name: Install numcodecs
-        run: |
-          export DISABLE_NUMCODECS_AVX2=""
-          # TODO: Remove this conditional when pcodec supports Python 3.14
-          if [[ "${{ matrix.python-version }}" == "3.14" ]]; then
-            python -m pip install -v -e .[test,test_extras,msgpack,google_crc32c,crc32c,zfpy]
-          else
-            python -m pip install -v -e .[test,test_extras,msgpack,google_crc32c,crc32c,pcodec,zfpy]
-          fi
+          pixi-version: v0.62.2
+          cache: false
+          environments: test-${{ matrix.python-version }}
 
       - name: List installed packages
-        run: python -m pip list
+        run: pixi run -e test-${{ matrix.python-version }} uv pip list
 
       - name: Run tests
-        shell: "bash -l {0}"
-        run: pytest -v
+        run: pixi run -e test-${{ matrix.python-version }} run-tests
 
       - uses: codecov/codecov-action@v5
         with:
@@ -89,9 +61,9 @@ jobs:
           fetch-depth: 0 # required for version resolution
 
       - name: Set up Pixi
-        uses: prefix-dev/setup-pixi@v0.9.0
+        uses: prefix-dev/setup-pixi@v0.9.4
         with:
-          pixi-version: v0.49.0
+          pixi-version: v0.62.2
           cache: false
 
       - name: List installed packages
diff --git a/pyproject.toml b/pyproject.toml
index a47600dc..d0f7bc29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -259,17 +259,29 @@ conflicts = [
 
 [tool.pixi.workspace]
 channels = ["conda-forge"]
-platforms = ["linux-64", "osx-arm64", "osx-64", "win-64"]
+platforms = ["linux-64", "linux-aarch64", "osx-arm64", "osx-64", "win-64"]
 
 [tool.pixi.dependencies]
-python = "=3.14"
-clang = ">=19.1.7,<20"
 c-compiler = ">=1.9.0,<2"
 cxx-compiler = ">=1.9.0,<2"
 uv = "*"
 
+# Python version features
+[tool.pixi.feature.py311.dependencies]
+python = "3.11.*"
+
+[tool.pixi.feature.py312.dependencies]
+python = "3.12.*"
+
+[tool.pixi.feature.py313.dependencies]
+python = "3.13.*"
+
+[tool.pixi.feature.py314.dependencies]
+python = "3.14.*"
+
+# Test dependencies
 [tool.pixi.feature.test.pypi-dependencies]
-numcodecs = { path = ".", editable = true, extras = ["test","test_extras","msgpack","zfpy"] }
+numcodecs = { path = ".", editable = true, extras = ["test", "test_extras", "msgpack", "zfpy", "pcodec"] }
 
 [tool.pixi.feature.test-google-crc32c.pypi-dependencies]
 numcodecs = { path = ".", editable = true, extras = ["google_crc32c"] }
@@ -277,16 +289,21 @@ numcodecs = { path = ".", editable = true, extras = ["google_crc32c"] }
 [tool.pixi.feature.test-crc32c.pypi-dependencies]
 numcodecs = { path = ".", editable = true, extras = ["crc32c"] }
 
+# Environments
 [tool.pixi.environments]
-default = { solve-group = "default" }
-test = ["test"]
-test-crc32c = ["test", "test-crc32c"]
-test-google-crc32c = ["test", "test-google-crc32c"]
+default = { features = ["py314"], solve-group = "py314" }
+test-py311 = { features = ["test", "test-google-crc32c", "py311"], solve-group = "py311" }
+test-py312 = { features = ["test", "test-google-crc32c", "py312"], solve-group = "py312" }
+test-py313 = { features = ["test", "test-google-crc32c", "py313"], solve-group = "py313" }
+test-py314 = { features = ["test", "test-google-crc32c", "py314"], solve-group = "py314" }
+test-crc32c = { features = ["test", "test-crc32c", "py314"], solve-group = "py314-crc32c" }
+test-google-crc32c = { features = ["test", "test-google-crc32c", "py314"], solve-group = "py314-google-crc32c" }
 
+# Tasks
 [tool.pixi.tasks]
 ls-deps-312 = "uv run --group test-zarr-312 uv pip freeze"
 ls-deps-313 = "uv run --group test-zarr-313 uv pip freeze"
-ls-deps-main = "uv run --group test-zarr-main uv pip freeze"
+ls-deps-main = "uv run --group test-zarr-main 'uv pip freeze'"
 test-zarr-312 = "uv run --group test-zarr-312 pytest --cov=numcodecs --cov-report=xml --cov-report=term numcodecs/tests/test_zarr3.py numcodecs/tests/test_zarr3_import.py"
 test-zarr-313 = "uv run --group test-zarr-313 pytest --cov=numcodecs --cov-report=xml --cov-report=term numcodecs/tests/test_zarr3.py numcodecs/tests/test_zarr3_import.py"
 test-zarr-main = "uv run --group test-zarr-main pytest --cov=numcodecs --cov-report=xml --cov-report=term numcodecs/tests/test_zarr3.py numcodecs/tests/test_zarr3_import.py"