{ description = "A very basic flake"; inputs = { utils.url = "github:numtide/flake-utils"; }; outputs = { self, nixpkgs, utils }: utils.lib.eachDefaultSystem (system: let pkgs = nixpkgs.legacyPackages.${system}; in { devShell = pkgs.mkShell { buildInputs = with pkgs; [ cabal-install haskell.compiler.ghc96 zlib.dev ]; }; } ); }