anchor.diff:  
     buildInputs = [
       fuse
  +    fuse3
       gnutls
       libxml2
     ];
  
positive.code: , perl
  , libxml2
  , fuse
  , gnutls
  }:
  
  stdenv.mkDerivation rec {
    pname = "libnbd";
    version = "1.9.5";
  
    src = fetchurl {
      url = "https://download.libguestfs.org/libnbd/${lib.versions.majorMinor version}-development/${pname}-${version}.tar.gz";
      hash = "sha256-BnMoxIiuwhqcwVr3AwAIFgZPcFsIg55N66ZwWMTUnCw=";
    };
  
    nativeBuildInputs = [
  
negative.code:     platforms = with platforms; linux;
    };
  }
  # TODO: package the 1.6-stable version too
  # TODO: git version needs ocaml
  # TODO: bindings for go, ocaml and python
  