[Box Backup] regex missing on my cygwin?

[E.W. Peter Jalajas]

Hi again,

I'm using boxbackup version 0.09_autoconf_win32 on cygwin on WinXP.  It
works fine, except when I try to use regex to exclude some large files:

Exception caught (Common RegexNotSupportedOnThisPlatform (Your platform
does not have built in regular expression libraries.) 1/30), reset
state and waiting to

I thought I had been using regex on this system earlier.  But I might
have reinstalled cygwin and/or other boxbackup-related apps since that
time.  The 1.33.1-1 boost and boost-devel Portable C++ libraries
packages are currently listed as installed under cygwin setup.exe.

Any help would be appreciated.  (This isn't a boxbackup compile-time
option, is it?)

Thanks,
Pete