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{
  description = "A basic gomod2nix flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    pre-commit-hooks = {
      url = "github:cachix/pre-commit-hooks.nix";
    };
    gomod2nix = {
      url = "github:nix-community/gomod2nix";
      inputs = {
        nixpkgs.follows = "nixpkgs";
        flake-utils.follows = "flake-utils";
      };
    };
    simple-css = {
      url = "https://raw.githubusercontent.com/kevquirk/simple.css/v2.3.1/simple.css";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, flake-utils, gomod2nix, pre-commit-hooks, simple-css }:
    {
      nixosModules = {
        web = import ./nix/modules self;
      };
    } // (flake-utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [
              (import ./nix/overlays)
              gomod2nix.overlays.default
            ];
          };

          # The current default sdk for macOS fails to compile go projects, so we use a newer one for now.
          # This has no effect on other platforms.
          callPackage = pkgs.darwin.apple_sdk_11_0.callPackage or pkgs.callPackage;
        in
        rec {
          packages.css = "${simple-css}";
          packages.default = callPackage ./nix/package.nix {
            inherit (gomod2nix.legacyPackages.${system}) buildGoApplication;
            css = simple-css;
          };
          devShells.default = callPackage ./nix/dev-shell.nix {
            pre-commit-check = {
              inherit (self.checks.${system}.pre-commit-check)
                shellHook
                enabledPackages;
            };
            inherit (gomod2nix.legacyPackages.${system}) mkGoEnv gomod2nix;
          };
          checks = {
            pre-commit-check = pre-commit-hooks.lib.${system}.run (
              import ./nix/pre-commit-checks.nix {
                inherit pkgs;
              }
            );
            buildVersion = pkgs.testers.testVersion {
              package = packages.default;
            };
          };
        })
    );
}