anchor.diff:  
     buildInputs = [
       json_c
  -    libuuid
       openssl
       python3
       systemd
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "libnvme";
    version = "1.1";
  
    outputs = [ "out" "man" ];
  
  
negative.code:     owner = "linux-nvme";
      repo = "libnvme";
      rev = "v${version}";
      sha256 = "sha256-U9Fj3OcBe32C0PKhI05eF/6jikHAvdyvXH16IY0rWxI=";
    };
  
    postPatch = ''
  