Haskell

Updated: 17 August 2026

Start a new Haskell project

cabal update
cabal init --interactive

Build

cabal build

Run directly from cabal

cabal run my-cli-tool -- --help
cabal run my-cli-tool -- --hello World

Install a binary to ~/.cabal/bin

cabal install

Updated: 17 August 2026

Start a REPL

ghci

runghc interprets a source file instead of compiling it and does not create build artifacts

runghc hello.hs

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