2 trees for inkscape

[Wolf Drechsel]

>> create one tree, let's say containing a set of X11 variants,
>> do something like
>> mv /opt/local /opt/local-X11
>> do a second macports install
>> create a tree containing the aqua variants
>>
>> finally switch the variants by just renaming /opt/local-xxx.
>>
>> Does that idea have a chance to work?
>
> Possibly, but why not just have two MacPorts installations in  
> different prefixes and use whichever one you need at the time? What  
> path recommendations does the Inkscape wiki make?

It may be hard to imagine, but I'm not at all familiar with the  
concepts of prefixes and paths - and neither how to handle a  
"variants.conf". I read quite a bit about it - but up to now I didnt  
get the clou… - so I'm looking for a solution I can understand.  
(BTHW: My English - I think - ist not so bad - but understanding Unix  
docu is another cup of tea…)

Did I get it right that all a macports installation contains is  
located within /opt/local/*
So "mounting" another tree at that position would make a completely  
different macports installation available?

Thanks and greetings,

Wolf