Hi,
changes in the eggs directory will not have any effect, and there is (AFAIK) no way to tell buildout to recompile the code.
However, you can locally check out the package (i.e. from GitHub) and make the modifications there. For that to work, you have to modify your buildout.cfg in the following way:
extensions = bob.buildout
mr.developer
auto-checkout = *
develop = src/<package>
.
[sources]
<package> = git https://github.com/bioidiap/<package>
where
``package`` is the package that you want to modify the code off. Afterwards, running ``./bin/buildout`` should check out the package from GitHub into the ``src`` directory, where you can modify the
code. Re-compilation is now possible by re-running
``./bin/buildout``.
I hope this helps
Manuel