build error on ng_deflate.4

[Emerald City / Daniel Duerr]

Hello,

Pardon me in advance if this is not the appropriate place for this 
message...  I have 4 production web servers which have been running very 
happily on the RELENG_6 branch for the past 6-9 months through 6-8 
successful kernel builds.  I just cvs-up'd the source tree like usual to 
do an upgrade and I can't seem to get past this error during a 'make 
buildworld':

make: don't know how to make ng_deflate.4. Stop
*** Error code 2

Stop in /usr/src/share/man.
*** Error code 1

Stop in /usr/src/share.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.

Any ideas?  Thanks in advance for your help...

Cheers,
Daniel