Error when create package after install via portupgrade on FreeBSD

Hi. When i try upgrade and create package after install via command:

`portupgrade -p cmake`

I get error on many packages:

`Installing jsoncpp-1.7.2_1...
===>  Building package for jsoncpp-1.7.2_1
pkg-static: open(/usr/ports/devel/jsoncpp/work/.metadir): No such file or directory
*** Error code 1`
