can I install a port with a different (previous) version ?

[Brunoc at quipo.it]

Hi,

I periodically update the port collection.However,sometimes may
happen that I need to install a different (previous) version of
a port,for example when the current version fails to build.
(This happened recently with the latest version of wine,a windows
emulator).
How can achieve this ?

Thank you
Bruno

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