make release error

[Maxim Vetrov]

Hi,

I'm running 5.4 and trying to make release of 6.0. While making release, 
I got next error:

...
cvs checkout: Updating doc/zh_TW.Big5/share
cvs checkout: Updating doc/zh_TW.Big5/share/sgml
if [ -d /usr/src/release/../../ports/distfiles/ ]; then  cp -rp 
/usr/src/release/../../ports/distfiles 
/data/RELEASE_60/bin/usr/ports/distfiles;  else  mkdir -p 
/data/RELEASE_60/bin/usr/ports/distfiles;  fi
make: don't know how to make checksum-recursive. Stop
*** Error code 2

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

What might cause it?

Maxim