anchor.diff:      zfsSupport = false;
     };
   
  -  grub2_xen = callPackage ../tools/misc/grub/2.0x.nix {
  +  grub2_xen = grub2_full.override {
       xenSupport = true;
     };
   
  
positive.code:     czmq = czmq3;
    };
  
    rsyslog-light = callPackage ../tools/system/rsyslog {
      libkrb5 = null;
      systemd = null;
      jemalloc = null;
  
negative.code: 
    heaptrack = libsForQt5.callPackage ../development/tools/profiling/heaptrack {};
  
    heimdall = libsForQt5.callPackage ../tools/misc/heimdall { };
  
    heimdall-gui = heimdall.override { enableGUI = true; };
  
    hevea = callPackage ../tools/typesetting/hevea { };
  
  