anchor.diff:      echo "VBOX_WITH_WARNINGS_AS_ERRORS :=" >> LocalConfig.kmk
     '';
   
  -  buildPhase = ''
  +  enableParallelBuilding = true;
  +
  +  preBuild = ''
       source env.sh
       kmk
       cd out/linux.*/release/bin/src
       export KERN_DIR=${kernel}/lib/modules/*/build
  -    make
  +  '';
  +
  +  postBuild = ''
       cd ../../../../..
     '';
       
     installPhase = ''
       # Install VirtualBox files
       cd out/linux.*/release/bin
  -    ensureDir $out/virtualbox
  +    mkdir -p $out/virtualbox
       cp -av * $out/virtualbox
       
       # Install kernel module
  
positive.code:     done
      
      # Create and fix desktop item
      ensureDir $out/share/applications
      sed -i -e "s|Icon=VBox|Icon=$out/virtualbox/VBox.png|" $out/virtualbox/virtualbox.desktop
      ln -sfv $out/virtualbox/virtualbox.desktop $out/share/applications
    '';
  
negative.code:     make install
      
      # Create wrapper script
      mkdir -p $out/bin
      cp -v ${./VBox.sh} $out/bin/VBox.sh
      sed -i -e "s|@INSTALL_PATH@|$out/virtualbox|" \
             -e "s|@QT4_PATH@|${qt4}/lib|" \
  