diff --git a/.github/workflows/build_and_publish.yml b/.github/workflows/build_and_publish.yml
index db5deecf..89387307 100644
--- a/.github/workflows/build_and_publish.yml
+++ b/.github/workflows/build_and_publish.yml
@@ -8,34 +8,24 @@ on:
       - published
 
 jobs:
-  build_sdist_and_wheel:
-    name: Build sdist and wheel on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04]
-
+  build:
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
         with:
+          ref: ${{ github.ref }}
           fetch-depth: 0
-
-      - name: Build
-        run: |
-          pip install build
-          python -m build
-
-      - name: Test install and import
-        run: |
-          python -m venv ./env
-          . ./env/bin/activate
-          pip install dist/*.whl
-          python -c "import spox"
-
-      - uses: actions/upload-artifact@v4
+      - name: Set up pixi
+        uses: prefix-dev/setup-pixi@ba3bb36eb2066252b2363392b7739741bb777659
+        with:
+          environments: build
+      - name: Build project
+        run: pixi run -e build build-wheel
+      - name: Upload package
+        uses: actions/upload-artifact@v4
         with:
+          name: artifact
           path: dist/*
-
   upload_pypi:
     name: Upload to PyPI
     needs: [build_sdist_and_wheel]
diff --git a/.github/workflows/weekly.yml b/.github/workflows/weekly.yml
index 32cd617b..8975b422 100644
--- a/.github/workflows/weekly.yml
+++ b/.github/workflows/weekly.yml
@@ -14,14 +14,10 @@ defaults:
 
 jobs:
   tests:
-    name: "Linux - weekly unit tests - ${{ matrix.OS }}"
-    runs-on: ${{ matrix.OS }}
+    name: "Linux - weekly unit tests - ubuntu-latest"
+    runs-on: ubuntu-latest
     env:
       CI: True
-    strategy:
-      fail-fast: true
-      matrix:
-        OS: ["ubuntu-latest"]
     steps:
       - name: Checkout branch
         uses: actions/checkout@v4