[Haskell-cafe] Build base with stack

Hello Cafe, Do you know a way to force a rebuild of base with stack? I don't want to modify it, just want to feed it through a customized ghc pipeline. Using stack is desirable for consistency with how other packages are run through that pipeline. When I download the appropriate base package and put it in a multi project stack directory, I see all the dependent packages are rebuilt, but not base. Thanks! Robin