Try installing custom pip after

Author: adamtheturtle

.github/workflows/ci.yml

@@ -44,11 +44,11 @@ jobs:
 
       - name: "Install dependencies"
         run: |
-          python -m pip install --upgrade 'pip ${{ matrix.pip-version }}'
           # We use '--ignore-installed' to avoid GitHub's cache which can cause
           # issues - we have seen packages from this cache be cause trouble with
           # pip-extra-reqs.
           python -m pip install --ignore-installed --upgrade --editable .[dev]
+          python -m pip install --upgrade 'pip ${{ matrix.pip-version }}'
           python -m pip install flake8
 
       - name: "Lint"