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We will install Stack, a modern tool to maintain different versions of GHC and to work with different packages. Perform the following steps:

Install Stack. Visit https://docs.haskellstack.org/en/stable/README/ and follow the instructions for your operating system.
Check that Stack works for your system by running the command stack --version at the command prompt.

Check the latest GHC version by visiting https://www.haskell.org/ghc/. Set up GHC on your box by providing the GHC version number:

If you have already set up GHC ...

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