siasia/xsbt-proguard-plugin — pull request #17 by adamw (2012-01-20 13:22:17+00:00)
Title: #15: When using multiple dependsOn(...), only the first is included in proguard args

Each project on which the one built depended, had the path ending with "classes", causing multiple projects to get glued together. Using the full path to the classes should fix the problem.