aclocal-1.12: error: 'configure.ac'

[Oleg simonoff]

Hi to all!
  Want to to ask the unix community about my problem. Don`t know what 
to do.....
  racking my brain over ...
  The system freeBSD 8.2
  Got some trouble with compilation portupgrade-2.4.9.9,2

  /usr/ports/ports-mgmt/portupgrade sudo make install
  ...........................
  ===> Configuring for ruby-1.8.7.370,1
  /usr/bin/touch /opt/ports/lang/ruby18/work/ruby-1.8.7-p370/configure
  aclocal-1.12: error: 'configure.ac' or 'configure.in' is required
  *** Error code 1

  Stop in /opt/ports/lang/ruby18javascript:doImageSubmit('Send').
  *** Error code 1

  Stop in /opt/ports/lang/ruby18.
  *** Error code 1

  Stop in /opt/ports/ports-mgmt/portupgrade.
  *** Error code 1

  Stop in /opt/ports/ports-mgmt/portupgrade.

  But that ruby was installd correctly.
  Please, let me know, what mast i do? Not found something about that 
in google......