Install an older package through macports [closed]

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Closed 6 years ago.

I am trying

sudo port install opencv @2.4.3_1+python27

but macports installs opencv @2.4.6.1_0+python27

how can I force macports to install the desired version of a package.

来源：https://stackoverflow.com/questions/18831402/install-an-older-package-through-macports