diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 73154fd6..2b81e19b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -35,10 +35,8 @@ jobs:
 
         - name: Install Python dependencies
           run: |
-            python -m ensurepip
-            which pip
-            pip --version
-            python -m pip --version
+            rm -r $(pip cache dir)/selfcheck
+            pip cache purge
             python -m pip install --upgrade pip wheel
             # Install attrdict3 to support the installation of wxPython from source.
             # In most cases, wxPython can be installed from wheels, but if those are not available,