diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index eecfd90f85..1720bca132 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -30,8 +30,8 @@ jobs:
         os: [macos-13, macos-14]
         include:
           - python-version: '3.9'
-            python.org.version: '3.9.13'
-            python.installer.name: 'macos11.pkg'
+            python-org-version: '3.9.13'
+            python-installer-name: 'macos11.pkg'
 
               #- python-version: '3.10'
               #  python.org.version: '3.10.11'
@@ -46,8 +46,8 @@ jobs:
               #  python.installer.name: 'macos11.pkg'
 
           - python-version: '3.13'
-            python.org.version: '3.13.0'
-            python.installer.name: 'macos11.pkg'
+            python-org-version: '3.13.0'
+            python-installer-name: 'macos11.pkg'
 
     steps:
       - name: Check out code
@@ -65,8 +65,8 @@ jobs:
 
       - name: Install Python from python.org
         run: |
-          installer="python-${{ matrix.python.org.version }}-${{ matrix.python.installer.name }}"
-          url="https://www.python.org/ftp/python/${{ matrix.python.org.version }}/${installer}"
+          installer="python-${{ matrix.python-org-version }}-${{ matrix.python-installer-name }}"
+          url="https://www.python.org/ftp/python/${{ matrix.python-org-version }}/${installer}"
           curl $url -o $installer
           sudo installer -pkg $installer -target /