Updated: 17 August 2026
Post installation
https://www.haskell.org/ghcup/steps/
https://www.haskell.org/ghcup/steps/#using-external-packages-in-ghci
https://www.haskell.org/ghcup/steps/#creating-a-proper-package-with-modules
Install other GHC versions and tools
ghcup tui