ksh93 build failure

[J. W. Ballantine]

I'm trying to build shells/ksh93 on FB 10-stable and it fails to build the 
work/bin/ksh93 program.  The tail of the build log is:

===>  Staging for ksh93-20120801_1
===>   Generating temporary packing list
install  -s -o root -g wheel -m 555 /usr/ports/shells/ksh93/work/bin/ksh 
/usr/ports/shells/ksh93/work/stage/usr/local/bin/ksh93
install: /usr/ports/shells/ksh93/work/bin/ksh: No such file or directory
*** Error code 71

Stop.
make[1]: stopped in /usr/ports/shells/ksh93
*** Error code 1

Stop.
make: stopped in /usr/ports/shells/ksh93

===>>> Installation of ksh93-20120801_1 (shells/ksh93) failed

Anyone have any idea on why it is failing?

Thanks

Jim Ballantine