I have just installed Haskell using Stack on Windows. I wanted to try and write some code to do network programming with TCP/IP. I found a simple example on Stack Overflow to start me off. I'm having some problems with PortNumber and deprecated warnings. I don't know how to modify the code to be deprecation free. stack install network - installed version 2.8.0.1 ------------------------- package.yaml network >= 2.8.0.1 --------------------------- The following code gives a deprecation warning, but ultimately my sample compiles and runs. import qualified Network import qualified Network.Socket main = Network.withSocketsDo $ do handle <- Network.connectTo "192.168.1.2" (Network.PortNumber 7200) talk handle `finally` hClose handle D:\work\hsSocket\app\Main.hs:14:46: warning: [-Wdeprecations] In the use of data constructor `PortNumber' (imported from Network): Deprecated: "The high level Network interface is no longer supported. Please use Network.Socket." ----------------------------------------- So, now I try and use Network.Socket as the warning indicates. main = Network.withSocketsDo $ do handle <- Network.connectTo "192.168.1.2" (Network.Socket.PortNumber 7200) talk handle `finally` hClose handle D:\work\hsSocket\app\Main.hs:15:46: error: Not in scope: data constructor `Network.Socket.PortNumber' Module `Network.Socket' does not export `PortNumber'. | 15 | handle <- Network.connectTo "192.168.1.2" (Network.Socket.PortNumber 7200)