Can not remove the new MacPorts Mojave package

[Bill Cole]

On 9 Nov 2018, at 5:31, Dr M J Carter wrote:

> On Wed, Oct 03, 2018 at 01:25:28PM +0100, Chris Jones wrote:
>> On 03/10/18 13:16, S. L. Garwood via macports-users wrote:
>>> I installed the new Macports bundle mentioned in Josha Root’s 
>>> email.
>>> Install went fine, but now it will not uninstall — doing the 
>>> “rm”
>>> commands in /opt/local gets a series of errors
>>>
>>> rm: /opt/local/var/macports/home/Library/Preferences: Operation not
>>> permitted
>>> rm: /opt/local/var/macports/home/Library: Operation not permitted
>>> rm: /opt/local/var/macports/home: Operation not permitted

Those imply protection by Apple's SIP *or* BSD file flags.

What does 'ls -lORa /opt/local/var/macports/home/' tell you about flags? 
(the field after the group, will be '-' if no flags are set.)