{ inputs = { nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05"; flake-utils.url = "github:numtide/flake-utils"; }; outputs = { self, nixpkgs, flake-utils, ... }@inputs: flake-utils.lib.eachDefaultSystem (system: let pkgs = import nixpkgs { inherit system; }; in { devShells.default = pkgs.mkShell { buildInputs = with pkgs; [ haskell.compiler.ghc90 cabal-install llvm_18 ]; }; } ); }