We have added support for the build2 build systems to 136 out of 145 Boost libraries and version 1.77.0 is now available from the cppget.org package repository. For details, see: https://build2.org/blog/build2-boost.xhtml Folks on this mailing list may be particularly interested in the "Implementation Details" section where we go deeper into how this conversion was accomplished: https://build2.org/blog/build2-boost.xhtml#impl-details (There is also the README-DEV file in the repository linked from this section which has even more details.) Also, let me add that this is not a call to convert Boost to build2. While we would gladly assist with this effort if the Boost community so wishes, we are also happy to continue our work out of tree.