{ pkgs ? import <nixpkgs> { } }:
with pkgs;
let
  ed25519_agent_lib = callPackage "${fetchgit {
    url = "https://gitea.rixxc.de/rixxc/ed25519_agent.git";
    rev = "d2ae2cd9142671a8e13d6f133b8d5429e507cd78";
    hash = "sha256-hKKzsRY7IvM4eq8ybWZ5Z/ix7Oaohvcz6qngM+jGIgU=";
  }}/default.nix"
    { inherit pkgs; };

  harness = fetchgit {
    url = "https://gitea.rixxc.de/rixxc/agent_harness.git";
    rev = "f7720356f3db3bdf2b115e13afe521ba06c10fe1";
    hash = "sha256-6FTNByDZp9DRukuMQrlsrbouSytrllfdrULhS7UMwqs=";
  };

  ed25519_agent = callPackage "${harness}/default.nix" { inherit pkgs; agent = ed25519_agent_lib; };
in
mkShell {
  name = "agent-test";

  ED25519_AGENT_PATH = "${ed25519_agent}/bin/agent_harness";
  ED25519_KEYFILE = "./keyfile";
}