anchor.diff:    };
   
     nativeBuildInputs = [ bison flex python pkgconfig ];
  -  buildInputs = [ ncurses libusb freetype gettext devicemapper ]
  +  buildInputs = [ ncurses libusb freetype gettext devicemapper fuse ]
       ++ optional doCheck qemu
       ++ optional zfsSupport zfs;
   
  
positive.code: { stdenv, fetchurl, fetchFromSavannah, autogen, flex, bison, python, autoconf, automake
  , gettext, ncurses, libusb, freetype, qemu, devicemapper, unifont, pkgconfig
  , zfs ? null
  , efiSupport ? false
  , zfsSupport ? true
  
negative.code: 
    patches = [ ./fix-bash-completion.patch ];
  
    configureFlags = [ "--enable-grub-mount" ] # dep of os-prober
      ++ optional zfsSupport "--enable-libzfs"
      ++ optionals efiSupport [ "--with-platform=efi" "--target=${efiSystemsBuild.${stdenv.system}.target}" "--program-prefix=" ]
      ++ optionals xenSupport [ "--with-platform=xen" "--target=${efiSystemsBuild.${stdenv.system}.target}"];
  
  