anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "nvme-cli";
  -  version = "2.1.2";
  +  version = "2.2.1";
   
     src = fetchFromGitHub {
       owner = "linux-nvme";
       repo = "nvme-cli";
       rev = "v${version}";
  -    hash = "sha256-ZjgysgWMmBlN+aalI5u2vQ58XrtEbJlDPCqUN6avv08=";
  +    hash = "sha256-okYtGiKUPNO31ntD9j5iAgdcnS5OQ/g1QAY+svhga4c=";
     };
   
     mesonFlags = [
  
positive.code: { lib, stdenv, fetchFromGitHub, pkg-config
  , meson
  , ninja
  , libuuid
  , libnvme
  , json_c
  , zlib
  
negative.code:     python3.pkgs.nose2
    ];
    buildInputs = [
      libnvme
      json_c
      zlib
  