{ description = "A very basic flake"; inputs = { easy-hls = { url = "github:jkachmar/easy-hls-nix"; }; flake-utils = { url = "github:numtide/flake-utils"; inputs.nixpkgs.follows = "nixpkgs"; }; }; outputs = { self, nixpkgs, flake-utils, easy-hls }: { overlay = final: prev: { haskellPackages = prev.haskellPackages.override ( old: { overrides = final.lib.composeExtensions ( old.overrides or (_: _: {})) (f: p: { reddit-pub = f.callPackage ./. {}; }); } ); }; } // flake-utils.lib.eachSystem ["x86_64-linux" "x86_64-darwin"] ( system: let pkgs = import nixpkgs { inherit system; overlays = [ self.overlay ]; }; hp = pkgs.haskellPackages; hls = (easy-hls.withGhcs [ hp.ghc.version ] ).${system}; in rec { packages.reddit-pub = pkgs.haskell.lib.justStaticExecutables hp.reddit-pub; packages.reddit-pub-dhall = pkgs.dhallPackages.callPackage ./dhall.nix {}; defaultPackage = packages.reddit-pub; devShell = hp.shellFor { packages = h: [h.reddit-pub]; withHoogle = true; buildInputs = with pkgs; [ dhall-lsp-server entr cabal-install hp.hlint stylish-haskell ghcid hls rrdtool jq sqlite-interactive sqlite-interactive hp.graphmod hp.dhall-nixpkgs ]; }; } ); }