anchor.diff:    '';
   
     # See https://github.com/NixOS/nixpkgs/issues/672 for details
  -  extpackRevision = "93733";
  +  extpackRevision = "95030";
     extensionPack = requireFile rec {
       name = "Oracle_VM_VirtualBox_Extension_Pack-${version}-${extpackRevision}.vbox-extpack";
       # IMPORTANT: Hash must be base16 encoded because it's used as an input to
       # VBoxExtPackHelperApp!
       # Tip: see http://dlc.sun.com.edgesuite.net/virtualbox/4.3.10/SHA256SUMS
  -    sha256 = "f931ce41b2cc9500dc43aba004630cf7bb7050ba737eae38827e91062f072d1f";
  +    sha256 = "b965c3565e7933bc61019d2992f4da084944cfd9e809fbeaff330f4743d47537";
       message = ''
         In order to use the extension pack, you need to comply with the VirtualBox Personal Use
         and Evaluation License (PUEL) by downloading the related binaries from:
  
positive.code: 
  let
  
    version = "4.3.12"; # changes ./guest-additions as well
  
    forEachModule = action: ''
      for mod in \
  
negative.code: 
    src = fetchurl {
      url = "http://download.virtualbox.org/virtualbox/${version}/VirtualBox-${version}.tar.bz2";
      sha256 = "bc893adde4449a2d35d8b4d0b8b247f0f2ac62a434fd8a8f7c54f613a100855a";
    };
  
    buildInputs =
  