failed configure of multimedia/handbrake

[Charlie Kester]

I'm getting a strange error while trying to install the handbrake port:


===>  Configuring for handbrake-0.9.3
sed: /usr/ports/multimedia/handbrake/work/HandBrake-0.9.3//usr/ports/multimedia/handbrake/work/HandBrake-0.9.3/configure: No such file or directory
*** Error code 1

Stop in /usr/ports/multimedia/handbrake.

Looking at the port Makefile and bsd.port.mk, I can't see why sed is
being run here.  Nor can I see why ${WRKSRC} is appearing twice in the
path to the configure script.

Any ideas?