anchor.diff:    meta = {
       homepage = http://www.xen.org/;
       description = "Xen hypervisor and management tools for Dom0";
  +    platforms = [ "i686-linux" "x86_64-linux" ];
  +    maintainers = [ stdenv.lib.maintainers.eelco ];
     };
   }
  
positive.code: 
        substituteInPlace tools/python/xen/xend/XendQCoWStorageRepo.py \
          --replace /usr/sbin/qcow-create $out/sbin/qcow-create
      '';
  
    installPhase =
  
negative.code: { stdenv, fetchurl, which, zlib, pkgconfig, SDL, openssl, python
  , libuuid, gettext, ncurses, dev86, iasl, pciutils, bzip2, xz
  , lvm2, utillinux, procps, texinfo }:
  
  with stdenv.lib;
  
  let
  
    version = "4.0.1";
  
    # Sources needed to build the stubdoms.
  
    stubdomSrcs =
      [ { url = http://xenbits.xensource.com/xen-extfiles/lwip-1.3.0.tar.gz;
          sha256 = "13wlr85s1hnvia6a698qpryyy12lvmqw0a05xmjnd0h71ralsbkp";
        }
        { url = http://xenbits.xensource.com/xen-extfiles/zlib-1.2.3.tar.gz;
          sha256 = "0pmh8kifb6sfkqfxc23wqp3f2wzk69sl80yz7w8p8cd4cz8cg58p";
        }
        { url = http://xenbits.xensource.com/xen-extfiles/newlib-1.16.0.tar.gz;
          sha256 = "01rxk9js833mwadq92jx0flvk9jyjrnwrq93j39c2j2wjsa66hnv";
        }
        { url = http://xenbits.xensource.com/xen-extfiles/grub-0.97.tar.gz;
          sha256 = "02r6b52r0nsp6ryqfiqchnl7r1d9smm80sqx24494gmx5p8ia7af";
        }
        { url = http://xenbits.xensource.com/xen-extfiles/pciutils-2.2.9.tar.bz2;
          sha256 = "092v4q478i1gc7f3s2wz6p4xlf1wb4gs5shbkn21vnnmzcffc2pn";
        }
      ];
  
  in 
  
  stdenv.mkDerivation {
    name = "xen-${version}";
  