anchor.diff:  
       # Install binaries
       mkdir -p $out/sbin
  +    install -m 4755 lib/VBoxGuestAdditions/mount.vboxsf $out/sbin/mount.vboxsf
       install -m 755 sbin/VBoxService $out/sbin
   
       mkdir -p $out/bin
  
positive.code:         ''
          else throw ("Architecture: "+stdenv.system+" not supported for VirtualBox guest additions")
          }
      done
  
      # Change rpath for various binaries and libraries
      patchelf --set-rpath ${stdenv.gcc.gcc}/lib:${libX11}/lib:${libXt}/lib:${libXext}/lib:${libXmu}/lib:${libXfixes}/lib:${libXrandr}/lib:${libXcursor}/lib bin/VBoxClient
  
      for i in lib/VBoxOGL*.so
      do
          patchelf --set-rpath $out/lib $i
      done
  
      # Remove references to /usr from various scripts and files
  
negative.code:     cd ..
  
      # Change the interpreter for various binaries
      for i in sbin/VBoxService bin/{VBoxClient,VBoxControl} lib/VBoxGuestAdditions/mount.vboxsf
      do
          ${if stdenv.system == "i686-linux" then ''
            patchelf --set-interpreter ${stdenv.glibc}/lib/ld-linux.so.2 $i
  