https://gerrit.wikimedia.org/r/c/mediawiki/tools/scap/+/773809/1/ fails to build:
python3 "-m" "easy_install" "pip" && python3 "-m" "pip" "install" "-U" "setuptools!=60.9.0" "wheel" "tox" "pip"
---> Running in afa961f7ec63
Searching for pip
Reading https://pypi.python.org/simple/pip/
Couldn't find index page for 'pip' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
No local packages or working download links found for pip
error: Could not find suitable distribution for Requirement.parse('pip')https://bugzilla.redhat.com/show_bug.cgi?id=1981333 says pypi.org now requires SSL with the SNI extension which easy_install does not support. That effectively means easy_install is no more usable and one can use python3-pip package to bootstrap pip.
Blubber should stop using easy_install and install the python3-pip package to provide the pip command.