suntheme/flake.nix

{
  description = "Suntheme's development and build environment";

  inputs.haskellNix.url = "github:input-output-hk/haskell.nix";
  inputs.nixpkgs.follows = "haskellNix/nixpkgs-unstable";
  inputs.flake-utils.url = "github:numtide/flake-utils";
  outputs = {
    self,
    nixpkgs,
    flake-utils,
    haskellNix,
  }: let
    supportedSystems = [
      "x86_64-linux"
      "x86_64-darwin"
      "aarch64-linux"
      "aarch64-darwin"
    ];
  in
    flake-utils.lib.eachSystem supportedSystems (system: let
      overlays = [
        haskellNix.overlay
        (final: prev: {
          suntheme = final.haskell-nix.project' {
            src = ./.;
            compiler-nix-name = "ghc982";
            shell.tools = {
              cabal = {};
              hlint = {};
              haskell-language-server = {};
            };
            shell.buildInputs = with pkgs; [
              at
            ];
          };
        })
      ];
      pkgs = import nixpkgs {
        inherit system overlays;
        inherit (haskellNix) config;
      };
      flake = pkgs.suntheme.flake {};
    in
      flake
      // {
        formatter = pkgs.alejandra;

        packages.default = flake.packages."suntheme:exe:suntheme";
      });

  nixConfig = {
    extra-substituters = ["https://cache.iog.io"];
    extra-trusted-public-keys = ["hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="];
    allow-import-from-derivation = "true";
  };
}