anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "kubernetes";
  -  version = "1.19.5";
  +  version = "1.20.4";
   
     src = fetchFromGitHub {
       owner = "kubernetes";
       repo = "kubernetes";
       rev = "v${version}";
  -    sha256 = "15bv620fj4x731f2z2a9dcdss18rk379kc40g49bpqsdn42jjx2z";
  +    sha256 = "0nni351ya688dphdkpyq94p3wjw2kigg85kmalwdpv5wpz1abl5g";
     };
   
     nativeBuildInputs = [ removeReferencesTo makeWrapper which go rsync installShellFiles ];
  
positive.code: 
    postBuild = ''
      ./hack/update-generated-docs.sh
      (cd build/pause && cc pause.c -o pause)
    '';
  
    installPhase = ''
  
negative.code:       install -D _output/local/go/bin/''${p##*/} -t $out/bin
      done
  
      install -D build/pause/linux/pause -t $pause/bin
      installManPage docs/man/man1/*.[1-9]
  
      cp cluster/addons/addon-manager/kube-addons.sh $out/bin/kube-addons
  