title: Getting a buildable Boost extract with bcp
body: <p>I'm using bcp to extract Boost.Archive from Boost. Unfortunately I can't build this extract. Boost.Archive is not a header-only library.</p>
  
  <p>bjam complains</p>
  
  <pre><code>Unable to load Boost.Build: could not find "boost-build.jam"
  </code></pre>
  
  <p>Is there any way to tell bcp to make the extract buildable with bjam (copy boost-build.jam to the right place)?</p>