Goal models are effective in capturing stakeholder needs at the time when features of the system-to-be have not yet been conceptual- ized. Relating goals to solution-oriented features gives rise to a requirement traceability problem. In this paper, we present a new model-driven extension to an Early Requirements Engineering tool (OpenOME) that generates an initial feature model of the system- to-be from stakeholder goals. Enabled by such generative map- ping, configuration constraints among variability features can be obtained by reasoning about stakeholder goals.