Orbit Source Bundles In Your Build
Typically source features are being generated as part of the build, find the build.properties requesting the creation of the source feature (it usually appears in the build.properties of the SDK feature including your source feature) and append an entry for each of the source plug-in you are re-consumming from Orbit to the generate@ property. The format of these entry is:
For example, the build.properties of the org.eclipse.sdk feature has now the following format
email@example.com = org.eclipse.platform,\ firstname.lastname@example.org;version=2.4.0.qualifier;unpack="true",\ email@example.com;version=2.0.0.qualifier;unpack="true"