{
  description = "Sampad server";
  inputs = {
    utils.url = "github:numtide/flake-utils";
    devshell.url = "github:numtide/devshell";
    naersk.url = "github:nix-community/naersk";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };
   outputs = { self, nixpkgs, utils, naersk, devshell, rust-overlay }:
    utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        naersk-lib = pkgs.callPackage naersk { };
      in
      {
        defaultPackage = naersk-lib.buildPackage ./.;

        defaultApp = utils.lib.mkApp {
          drv = self.defaultPackage."${system}";
        };
        devShell =
        let pkgs = import nixpkgs {
          inherit system;

          overlays = [ devshell.overlay (import rust-overlay)];
        };
        in
        pkgs.devshell.mkShell {
          packages = with pkgs; [ dhall (rust-bin.stable.latest.default.override {
            extensions = [ "rls" ];
          })];
        };
      });
}