I have been using a custom namespace for my boost libraries, as well as only building a small subset of modules.  Therefore, I follow this process (which worked fine in 1.53 and 1.55):

1. build b2, via bootstrap
2. build bcp, via b2
3. use bcp to copy modules (including build) to a new directory
4. update the includes, using a script
5. build the copied modules, using b2 from the original boost src directory (built in step 1)


However, step 5 now fails to find boost-build.jam in the latest version, boost 1.57.0.  I tried to look over similar topics on the mailing list, but they don't seem to have a suitable solution for my case.  Also, I tried using:

-sBOOST_ROOT=<new directory>

and the BOOST_ROOT environment variable, but got the same error message.

Did I miss some breaking behavior, where this process will no longer work?  Any suggestions are greatly appreciated.

Note:  I did update the location of b2, due to the change from tools/build/v2 to tools/build/src.  That was the only change required to get me to step 5.

Regards,
Kevin