I've noticed that regression test I'm running are failing on almost all tests in date_time and many tests in regex. Here's what I've found: bjam is building static library: libboost_date_time-71-mt-gd-1_32.lib Please note that there's no "vc71", but "71" instead. File: libboost_date_time-vc71-mt-gd-1_32.lib is not build, thus all tests linking to this file are failing. When I copy libboost_date_time-71-mt-gd-1_32.lib into libboost_date_time-vc71-mt-gd-1_32.lib , date_time tests are no longer failing. The same applies to dynamic library: what is actually being build is named: boost_date_time-71-mt-gd-1_32.lib boost_date_time-71-mt-gd-1_32.dll but for tests to succeed there should be: boost_date_time-vc71-mt-gd-1_32.lib boost_date_time-vc71-mt-gd-1_32.dll What's even more interesting, library files "71" are actually being used, too (besides "vc71" files). I've found that "cmd" files are referring to "71" files. I do not know what is referring to "vc71" files (maybe autolink feature?) The same problem plagued regression tests for regex library - libraries build by bjam are named : libboost_regex-71-mt-gd-1_32.lib boost_regex-71-mt-gd-1_32.lib boost_regex-71-mt-gd-1_32.dll while tests require also files named : libboost_regex-vc71-mt-gd-1_32.lib boost_regex-vc71-mt-gd-1_32.lib boost_regex-vc71-mt-gd-1_32.dll Any ideas what might be wrong? B.