anchor.diff:        as code and simple APIs to offload policy decision-making from your software. You can use OPA to enforce policies
         in microservices, Kubernetes, CI/CD pipelines, API gateways, and more.
       '';
  -    homepage = "https://www.openpolicyagent.org";
       license = licenses.asl20;
       maintainers = with maintainers; [ lewo jk ];
     };
  
positive.code: 
  buildGoModule rec {
    pname = "open-policy-agent";
    version = "0.28.0";
  
    src = fetchFromGitHub {
      owner = "open-policy-agent";
      repo = "opa";
      rev = "v${version}";
      sha256 = "sha256-khXcpV4bPfFwoQ4LrHFohhlTHOIDClZuE3qg+MYk36k=";
    };
  
    vendorSha256 = null;
  
negative.code:   '';
  
    meta = with lib; {
      homepage = "https://www.openpolicyagent.org";
      changelog = "https://github.com/open-policy-agent/opa/blob/v${version}/CHANGELOG.md";
      description = "General-purpose policy engine";
      longDescription = ''
        The Open Policy Agent (OPA, pronounced "oh-pa") is an open source, general-purpose policy engine that unifies
  