[boost] boost_1_44_0 strange build problem

I thought build was working OK on fedora f13 x86_64. But then I noticed something strange: I'm building like this: bjam -sHAVE_ICU=1 -sEXPAT_INCLUDE=/usr -sEXPAT_LIBPATH=/usr/lib64 -- layout=tagged threading=single,multi stage Running 1st time, I got no errors....updated 1353 targets... But then I reran in the same directory and got: ...patience... ...patience... ...patience... ...found 7771 targets... ...updating 96 targets... [ rebuilt release/link-static/libboost_math_c99f.a and release/link- static/libboost_math_c99.a ] ...updated 96 targets... Trying a 3rd time, nothing happens.