Solve “mongodb cannot be built while v8 is active” in MacPorts

While updating all the ports of macports I got this error:

--->  Configuring mongodb
Error: mongodb cannot be built while v8 is active.
Error: Please deactivate v8 and try again.
Error: You can reactivate v8 again later.
Error: org.macports.configure for port mongodb returned: v8 is active

To deactivate v8 run:

sudo port -f deactivate v8

Run the update process again:

sudo port upgrade outdated

And finally activate v8 again:

sudo port activate v8

Ref: http://widgetbook.blogspot.com.es/2013/08/mongodb-and-macports-and-v8.html