Do not download latest pip on virtualenvs .
Release 12.0 is broken. https://github.com/pypa/pip/issues/7620#issuecomment-576653911
Signed-off-by: Michael Hofmann mhofmann@redhat.com
Release 12.0 is broken. https://github.com/pypa/pip/issues/7620#issuecomment-576653911
Signed-off-by: Michael Hofmann mhofmann@redhat.com