AOC Setup stack setup stack build stack exec aoc IDE Setup https://medium.com/@dogwith1eye/setting-up-haskell-in-vs-code-with-stack-and-the-ide-engine-81d49eda3ecf Language Server changes : clone haskell-language-server instead of haskell-ide-engine stack ./install.hs hls-8.8.4 stack ./install.hs data REPL stack ghci Reload : :r