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

    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    naersk = {
      url = "github:nix-community/naersk/master";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs @ {self, ...}:
    inputs.utils.lib.eachDefaultSystem (system: let
      pkgs = import inputs.nixpkgs {
        inherit system;

        overlays = [
          (import inputs.rust-overlay)
        ];
      };

      toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;

      naersk = pkgs.callPackage inputs.naersk {
        cargo = toolchain;
        rustc = toolchain;
      };
    in {
      packages.default = naersk.buildPackage {
        src = ./.;
        buildInputs = with pkgs; [sqlite];
      };
      formatter = pkgs.alejandra;
      checks = {
        inherit (self.packages.${system}) default;
        # TODO: clippy and other checks?
      };
      devShell = with pkgs;
        mkShell {
          buildInputs = [
            # dedupe from package inputs?
            sqlite

            toolchain

            rustfmt
            rustPackages.clippy
            rust-analyzer
            nodePackages_latest.vscode-langservers-extracted

            # to install sea-orm-cli
            pkg-config
            openssl

            hurl
          ];
          RUST_SRC_PATH = rustPlatform.rustLibSrc;
          shellHook = ''
            export MIGRATION_DIR="src/migrator"
            export DATABASE_URL="sqlite://./data/lyrs.sqlitedb?mode=rwc";
            export COOKIE_KEY="2z49_8yfKUkoTOo0cjzzjwufCfhKvfOIc1CGleuTXC5zRqY4U0Xhkd34ipREQN5iHRH62tt5O7y6U5mmFBH3MA"
            export RUST_BACKTRACE="1"
            export RUSTFLAGS="--cfg uuid_unstable"
          '';
        };
    });
}