{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    naersk.url = "github:nix-community/naersk";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { self, flake-utils, naersk, nixpkgs }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = (import nixpkgs) { inherit system; };

        naersk' = pkgs.callPackage naersk { };

        wwwPath = "www";

      in rec {
        # For `nix build` & `nix run`:
        packages.default = naersk'.buildPackage {
          src = ./.;
          nativeBuildInputs = with pkgs; [ pkg-config openssl sqlite ];
          GIT_HASH = "000000000000000000000000000000";
          postInstall = ''
            mkdir -p $out/templates
            mkdir -p $out/www
            cp -r ${wwwPath} $out/
          '';
        };

        nixosModules.default = { inputs, pkgs, ... }: {
          imports = [
            ./modules/sneedstr.nix
          ];
        };

        # For `nix develop`:
        devShells.default = pkgs.mkShell {
          nativeBuildInputs = with pkgs; [
            rustc
            cargo
            cargo-watch
            clippy
            rustfmt
            rust-analyzer
            pkg-config

            openssl
            sqlite
          ];
          env = {
            DATABASE_URL = "/tmp/sqlite.db";
            ADMIN_PUBKEY = "npub1m2w0ckmkgj4wtvl8muwjynh56j3qd4nddca4exdg4mdrkepvfnhsmusy54";
            CONFIG_ENABLE_AUTH = "false";
            CONFIG_RELAY_URL = "ws://0.0.0.0:8080";
            RUST_BACKTRACE = 1;
            RUST_LOG = "debug";
          };
        };
      });
}