anchor.diff:  { buildGoModule, fetchFromGitHub, lib }:
   
   let
  -  generic = { subPackages, pname, postInstall ? "" }:
  +  generic = { subPackages, pname, postInstall ? "", mainProgram }:
       buildGoModule rec {
         inherit pname;
         version = "6.4.1";
  
positive.code:       ];
  
        meta = {
          homepage = "https://sensu.io";
          description = "Open source monitoring tool for ephemeral infrastructure & distributed applications";
          license = lib.licenses.mit;
  
negative.code: 
        inherit subPackages postInstall;
  
        vendorSha256 = "sha256-fStGEKAR9fzA6Uom6r59jFGTBUfTTj0TzytoJWuicbU=";
  
        doCheck = false;
  
        ldflags = let
          versionPkg = "github.com/sensu/sensu-go/version";
  