[Haskell-cafe] Again, version conflicting problem with cabal-install

Hello, As I recalled, ghc works in staticly link mode. So after one library is compiled, all its build dependencies are useless. Lost, changed, wheresoever, it does not matter. Then why the problem of version conflicting exists? By version conflicting I mean like following. This way, A is not installable by cabal. A needs B 0.1 A needs C 0.1 B needs C0.2 -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com.