[Haskell-beginners] Fwd: cabal install snap-server-0.9.5.1: At least the following dependencies are missing: attoparsec >=0.10 && <0.13 && ==0.13.0.1

There is also a stack tool,

Thank you. It is very interesting. Why were new tools introduced instead of adding new functionality to cabal? A mix of packaging tools may lead to confusion.