{
  description = "CentralCloud ntfy server fork — push notification backend for oncall alerts";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
    flake-utils.url = "github:numtide/flake-utils";
  };

  nixConfig = {
    extra-substituters = [
      "https://cache.centralcloud.com/default"
    ];
    extra-trusted-public-keys = [
      "default:ywfU21WX06iOn2Ec2lae1jYh4w8LO4IQkmp06vJzsk8="
    ];
  };

  outputs = {
    nixpkgs,
    flake-utils,
    ...
  }:
    flake-utils.lib.eachDefaultSystem (system: let
      pkgs = import nixpkgs {inherit system;};
    in {
      devShells.default = pkgs.mkShell {
        packages = with pkgs; [
          go_1_24
          gotools        # goimports, godoc, etc.
          golangci-lint
          goreleaser

          # Frontend (web UI)
          nodejs_20
          nodePackages.npm

          # Dev tooling
          gnumake
          git
          curl
          jq
        ];

        shellHook = ''
          export GOPATH="$HOME/go"
          export PATH="$GOPATH/bin:$PATH"
          echo "CentralCloud ntfy server dev shell"
          echo "  go      : $(go version)"
          echo "  node    : $(node --version)"
          echo ""
          echo "Run:   go run main.go serve"
          echo "Build: make build"
          echo "Test:  go test ./..."
        '';
      };

      packages.default = pkgs.buildGoModule {
        pname = "ntfy";
        version = "2.22.0";
        src = ./.;
        vendorHash = null;
        doCheck = false;
        meta = {
          description = "Send push notifications to your phone or desktop via PUT/POST";
          homepage = "https://ntfy.sh";
          license = pkgs.lib.licenses.asl20;
          mainProgram = "ntfy";
        };
      };
    });
}