A conditional CSP is a well known formalism for managing constraints in a dynamic environment where the possible changes are known a priori and can be enumerated beforehand. In this paper we argue that mixing preferences with Conditional CSPs brings more intuitive meaning to many real world applications. For example, in a product configuration problem the user preferences often co-exist with the configuration requirements in a dynamic environment. We propose here an extension of the Conditional CSP formalism in order to consider qualitative preferences. We use CP-nets as a representation for these preferences and define new concepts for preserving their semantics in dynamic settings.