I have installed Haskell Platform 2012 in Windows 7. I write in the console cabal update and I take a message that there is a new version of cabal. I write ca
You need to add C:\username\AppData\Roaming\cabal (or whatever directory now has the cabal executable -- use e.g. dir or your favorite file manager to verify that you have the right place) to your %PATH% environment variable and restart your command prompt.