anchor.diff:  { lib, buildGoModule, fetchFromGitHub, fetchzip, installShellFiles }:
   
   let
  -  version = "0.20.1";
  -  sha256 = "1cbppkfw5jb0w36jjg32a4kffq616zdmib4kdhny4wwgskq4b2ng";
  -  manifestsSha256 = "0hwza39a31fjk37lgd0bdk8ja46sradyvkrnq2ad587zr8a8ddvb";
  +  version = "0.21.1";
  +  sha256 = "1sb3912h28z097n7mn3hlh33hnxr9978h04py2m7gh27hmygscj3";
  +  manifestsSha256 = "1rrnz50jfn3zgaz5hn7ghmgc31ahm4q49f0rxfagfygvks1h4910";
   
     manifests = fetchzip {
       url = "https://github.com/fluxcd/flux2/releases/download/v${version}/manifests.tar.gz";
  
positive.code:     inherit sha256;
    };
  
    vendorSha256 = "sha256-pY+fTOZocHygT8GdRQGOujr+Pik2f21H8cqIFBKvzYQ=";
  
    postUnpack = ''
      cp -r ${manifests} source/cmd/flux/manifests
  
negative.code:     '';
      homepage = "https://fluxcd.io";
      license = licenses.asl20;
      maintainers = with maintainers; [ jlesquembre bryanasdev000 ];
    };
  }
  