{
  description = "Synapse (development)";

  inputs = {
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, utils }:
    utils.lib.eachDefaultSystem (system: let
      pkgs = nixpkgs.legacyPackages."${system}";
    in rec {
      # `nix develop`
      devShell = pkgs.mkShell {
        nativeBuildInputs = with pkgs; [ rustc cargo python sqlite poetry postgresql icu clang ];
      };
    });
}