Failed to import pip: No module named 'pip' error while installing st2-rbac-backend

[DavidMeu]

Full error:

Collecting st2-rbac-backend
  Cloning https://github.com/StackStorm/st2-rbac-backend.git (to revision master) to /tmp/pip-install-uiium15i/st2-rbac-backend_0a2a4584a2ba46e584e078cd4bc7fe30
  Running command git clone -q https://github.com/StackStorm/st2-rbac-backend.git /tmp/pip-install-uiium15i/st2-rbac-backend_0a2a4584a2ba46e584e078cd4bc7fe30
  Resolved https://github.com/StackStorm/st2-rbac-backend.git to commit 15111880591283b520570b6752edef994bc272e8
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'error'
  ERROR: Command errored out with exit status 1:
   command: /root/virtualenv/bin/python /root/virtualenv/lib/python3.6/site-packages/pip/_vendor/pep517/in_process/_in_process.py get_requires_for_build_wheel /tmp/tmp5zm3l78q
       cwd: /tmp/pip-install-uiium15i/st2-rbac-backend_0a2a4584a2ba46e584e078cd4bc7fe30
  Complete output (4 lines):
  Failed to import pip: No module named 'pip'

Also noticed CI had failed on that err: https://app.circleci.com/pipelines/github/StackStorm/st2-rbac-backend/815/workflows/fa9a2e96-e11a-4f28-9066-4cb121d2651f/jobs/2472 https://app.circleci.com/pipelines/github/StackStorm/st2-rbac-backend/815/workflows/fa9a2e96-e11a-4f28-9066-4cb121d2651f/jobs/2473

[m4dcoder]

Fix at https://github.com/StackStorm/st2-rbac-backend/pull/59. It's merged.