can i specify a

project()

dependency from an old platform module to a new multiplatform and select which variant I want it to resolve? this will allow me to incrementally migrate rather than doing everything at once.

I believe you can specify a project dependency with an explicit configuration (

project(path: '...', configuration: '...')

), though that is not yet possible in the new dependencies DSL (https://youtrack.jetbrains.com/issue/KT-26663), so you can try to specify it in the Gradle's plain dependencies, as said in the issue description.