can't build virtualbox-ose

[Gary Aitken]

On 08/08/13 05:22, felix wrote:
> hi,all when i build the port, it shows the following messages.
> ===> Installing for gnutls-2.12.23_1
> ===>   Generating temporary packing list 
> ===>  Checking if security/gnutls already installed
> ===> gnutls-2.12.23_1 is already installed
> You may wish to ``make deinstall'' and install this port again
>  by ``make reinstall'' to
> upgrade it properly. If you really wish to overwrite the old port of
> security/gnutls without deleting it first, set the variable
> "FORCE_PKG_REGISTER" in your environment or the "make install"
> command line. *** [check-already-installed] Error code 1
...
> Stop in /usr/ports/emulators/virtualbox-ose.
> 
> I had run "portupgrade -fr security/gnutls", even though i run
> "portupgrade -a", the problem is still. any hints? thanks

I had this problem with a different port.
I think I got around it by cd'ing to the port directory and doing a make install.