[boost] boost cvs build failure: Unknown suffix

From: Neal Becker (ndbecker2_at_[hidden])
Date: 2005-06-07 13:49:45

PYTHON_ROOT=/usr PYTHON_VERSION=2.4 bjam -sTOOLS=gcc stage
Building Boost.Regex with the optional Unicode/ICU support disabled.
Please refer to the Boost.Regex documentation for more information
(and if you don't know what ICU is then you probably don't need it).
Unknown suffix on <@boost!libs!iostreams!build><<<<<<< - see UserObject rule
in Jamfile(5).