The document discusses migrating a Scala build tool (sbt) project from version 0.7 to 0.10. It provides an overview of the major changes in sbt 0.10, including new ways of configuration using basic or full Scala-based approaches. The author recommends using the full configuration for more power and comfort. Steps are outlined for migrating a Lift web framework project specifically, including changes to dependency management, plugins, and subprojects. Resources are provided to help understand the new sbt 0.10 features and configuration options.