anchor.diff:    BUILDTAGS = lib.optionals (btrfs-progs == null) [ "no_btrfs" ];
   
     buildPhase = ''
  +    runHook preBuild
       patchShebangs .
       make binaries man $buildFlags
  +    runHook postBuild
     '';
   
     installPhase = ''
  +    runHook preInstall
       install -Dm555 bin/* -t $out/bin
       installManPage man/*.[1-9]
       installShellCompletion --bash contrib/autocomplete/ctr
       installShellCompletion --zsh --name _ctr contrib/autocomplete/zsh_autocomplete
  +    runHook postInstall
     '';
   
     passthru.tests = { inherit (nixosTests) docker; };
  
positive.code:     owner = "containerd";
      repo = "containerd";
      rev = "v${version}";
      sha256 = "sha256-VV1cxA8tDRiPDxKV8OGu3T7sgutmyL+VPNqTeFcVjJA=";
    };
  
    vendorSha256 = null;
  
negative.code: 
  buildGoModule rec {
    pname = "containerd";
    version = "1.5.5";
  
    outputs = [ "out" "man" ];
  
  