.github/workflows/test-plone-5.2.yml

@@ -32,11 +32,9 @@ jobs:
         run: |
           make install-plone-5.2
 
-        ## setup-plone action is retired.
-        # uses: plone/setup-plone@v2.0.0
-        # with:
-        #   python-version: ${{ matrix.python-version }}
-        #   plone-version: "5.2.5"
+        ## Note: setup-plone action is retired, because we need to force
+        ## an older pip version, but the action seems to fetch the new version
+        ## regardless what I try.
 
       # python cache
       - uses: actions/cache@v1

Makefile

@@ -107,7 +107,6 @@ install-plone-5.2: bin/mxdev config ## pip install Plone packages
 	cp constraints-5.2.txt constraints.txt
 	cp requirements-5.2.txt requirements.txt
 	pip install pip\<24
-	pip install pip\<24
 	bin/tox -e init
 	bin/mxdev -c mx.ini
 	bin/pip install -r requirements-mxdev.txt