Hello, For several years now we've built Boost libraries on Windows with a minimal set of tags in the library and dll names. Our dlls and libs have looked like this: boost_atomic-mt-gd.dll boost_atomic-mt-gd.lib etc. We just upgraded from 1.65.1 to 1.69 and the same bjam command (with a new bootstrapped bjam) is now giving us an extra x64 tag: boost_atomic-mt-gd-x64.dll boost_atomic-mt-gd-x64.lib This is on VS2017 15.9.9. The bjam command we've used for years is: bjam.exe --toolset=msvc address-model=64 --stagedir=./stage64debug --build-dir=./build64debug --layout=tagged --without-mpi variant=debug link=shared threading=multi runtime-link=shared install --prefix=./win64debug/indep --exec-prefix=./win64debug/bin --libdir=./win64debug/lib --includedir=./win64debug/include Has a default setting in bjam been changed? What can we add to the bjam command to get back to the old minimal names? Thanks in advance. Damien