7.2-stable -> current upgrade problem

during mergemaster a got:

cd /usr/src/etc/pam.d; make install
install -o root  -g wheel -m 444  README  /var/tmp/temproot/etc/pam.d/ 
README
install -o root -g wheel  -m 644 atrun cron ftpd imap kde login other  
passwd pop3 rsh sshd su system telnetd xdm /var/tmp/temproot/etc/pam.d
/var/tmp/temproot/etc/pam.d/ftp -> /var/tmp/temproot/etc/pam.d/ftpd
Bad system call (core dumped)
*** Error code 140

Stop in /usr/src/etc/pam.d.
*** Error code 1

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

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

Stop in /usr/src.

   *** FATAL ERROR: Cannot 'cd' to /usr/src and install files to
       the temproot environment


done by normal upgrade procedure