This package provides a low-level networking interface. Other packages provide higher level interfaces: connection hookup network-simple network seeks to provide a cross-platform core for networking. As such some APIs live in extended libraries. Packages in the network ecosystem are often prefixed with network-. In network-3.0.0.0 the Network.BSD module was split off into its own package, network-bsd-3.0.0.0. In network-2.6 the Network.URI module was split off into its own package, network-uri-2.6. If you're using the Network.URI module you can automatically get it from the right package by adding this to your .cabal file: