link to issue:
@@ -300,6 +300,7 @@ class Virtualenv(PythonEnvironment):
site_packages,
# This is removed because of the pip breakage,
# it was sometimes installing pip 20.0 which broke everything
+ # https://github.com/readthedocs/readthedocs.org/issues/6585
# '--no-download',
env_path,
# Don't use virtualenv bin that doesn't exist yet
