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