- Add bcp to your path: `$env:Path += ";$boost_dir\bin.v2\tools\bcp\msvc-14.2\release\link-static\threading-multi"` (The correct output path should be printed by b2 during the build.)
-`cd` to this repo's directory (`...\externals\boost\`)
- Remove the existing boost from the repo: `rm -r boost` (This is only necessary if doing a Boost version upgrade, in case they removed any files in the new version.)
- Run `.\build.cmd $boost_dir` to build a new trimmed down distro.